- Add MVNORepository implementation with CreateMVNO, GetMVNO, UpdateMVNO, ListMVNOs, DeleteMVNO, and UpdateMVNOStatus methods
- Add MVNOFilter struct with status, plan, business_id, limit, offset, and date range filtering
- Add GetMVNO and GetMVNOByBusinessID methods with record not found error handling
- Add ListMVNOs with dynamic query building, filter application, and descending created_at ordering
- Add GetMVNOStats with total count, status distribution, and plan distribution aggregation
- Move TenantRepository and Repository interfaces from types.go to new interfaces.go file
- Add mvno package import for MVNO-related repository methods
- Add CreateMVNO, GetMVNO, GetMVNOByBusinessID, UpdateMVNO, ListMVNOs, DeleteMVNO, UpdateMVNOStatus, and GetMVNOStats methods to Repository interface
- Remove context import from types.go after interface extraction
- Replace if-else chain with switch statement for step.Status evaluation in monitor.go
- Maintain completed and failed case handling with cleaner control flow
- Rename Handler to MVNOHandler for clarity in handler_mvno.go
- Replace services.OnboardingService with OnboardingService interface for dependency injection
- Change monitor.OnboardingRequest, monitor.MVNOStatus, monitor.MVNOFilter, and monitor.MVNOPlan to mvno package types
- Remove monitor package import from handler_management.go and handler_mvno.go
- Add context.Context import for service method signatures
- Add Handler struct with StartOnboarding, GetMVNO, and ListMVNOs methods in handler_mvno.go
- Add ManagementHandler struct with GetMVNO, ListMVNOs, UpdateMVNOStatus, and GetMVNOStats methods in handler_management.go
- Add RegisterRoutes method for /mvno/onboarding, /mvno, and /mvno/:id route registration
- Add query parameter parsing for status, plan, and limit filters in ListMVNOs
- Add structured logging
- Add ProductionProvisioner struct with tenant, carrier, billing, and storage service dependencies
- Add TenantService, CarrierManager, BillingService, and StorageService interfaces for external integrations
- Add TenantConfig and CarrierInfo structs for tenant and carrier data models
- Add NewProductionProvisioner constructor with service dependency injection
- Add ProvisionResources method with tenant context
- Add provisionTenantContext with tenant config creation, settings mapping, and tenant service integration
- Add provisionDatabaseSchema with dedicated schema creation for MVNO isolation
- Add provisionStorageResources with plan-based storage allocation (10GB to 10TB)
- Add selectCarriers with country-based carrier selection, active status filtering, and duplicate prevention
- Add config
- Add Router struct with handler and logger dependencies for routing configuration
- Add NewRouter constructor with repository, service, and handler initialization
- Add SetupRoutes method with /api/v1 versioning, logging, and recovery middleware
- Add SetupMiddleware with CORS headers, rate limiting placeholder, and request ID tracking
- Add HealthCheck method with service status, name, and version response
- Add MVNOProvisioner struct with logger dependency for resource provisioning operations
- Add ProvisionResources method with tenant context, database schema, and storage provisioning
- Add SetupCarriers method with carrier selection, configuration, and carrier pool assignment
- Add SetupBilling method with billing ID generation, rate plan configuration, and payment processing setup
- Add SetupAPIAcc
- Add Repository interface with CreateMVNO, GetMVNO, UpdateMVNO, ListMVNOs, DeleteMVNO, and UpdateMVNOStatus methods
- Add GormRepository struct with db and logger dependencies for GORM-based persistence
- Add MVNOFilter struct with status, plan, business_id, limit, offset, and date range filtering
- Add GetMVNO and GetMVNOByBusinessID methods with record not found error handling
- Add ListMVNOs with dynamic query
- Add OnboardingMonitor struct with progress map and mutex for concurrent access
- Add UpdateProgress and GetProgress methods for tracking individual MVNO onboarding state
- Add GetAllProgress with map copy to prevent concurrent access issues
- Add GetActiveOnboardingCount and GetCompletedOnboardingCount for status aggregation
- Add GetAverageOnboardingTime calculation with completed onboarding duration tracking
- Add GetStepSuccess
- Add MVNO struct with ID, Name, BusinessID, Status, Plan, Config, and timestamps
- Add MVNOStatus enum with pending, review, approved, active, suspended, and terminated states
- Add MVNOPlan enum with starter, growth, scale, and enterprise tiers
- Add MVNOConfig struct with subscriber limits, country restrictions, carrier pool, and feature flags
- Add OnboardingRequest struct with business info, contact details, plan selection
- Add OnboardingValidator struct with ValidateRequest and ValidateMVNO methods in validator.go
- Add business info validation with name length, ID format, email regex, and phone length checks
- Add plan validation with subscriber limits for Starter (1000) and Growth (10000) plans
- Add technical requirements validation with country code format and use case length checks
- Add compliance validation with country-specific regulatory checks and restricted country filtering
- Add technical feasibility validation
- Add Handler struct with StartOnboarding, GetMVNO, and ListMVNOs methods in handler.go
- Add ManagementHandler struct with GetMVNO, ListMVNOs, UpdateMVNOStatus, and GetMVNOStats methods in handler_management.go
- Add RegisterRoutes method for /mvno/onboarding, /mvno, and /mvno/:id route registration
- Add query parameter parsing for status, plan, and limit filters in ListMVNOs
- Add structured logging with mvno_id, status, and error
- Replace vague "separate table or log system" comment with specific tenant_events table reference in CreateEvent
- Replace "For now, update tenant settings" with clearer "Store configuration in tenant metadata field and update settings" in UpdateConfig
- Remove "For now, we'll use a simple approach" qualifier from CreateEvent comment
- Replace map[string]interface{} with map[string]any in UpdateCarrierMetrics
- Replace interface{} with any for GeneratedAt field in PricingEffectiveness struct
- Replace loop-based empty string checks with slices.Contains in ValidateConditions
- Replace range loop index initialization with range-only syntax in calculateAPIPerformance
- Add slices import for standard library slice utilities
- Add revenue calculation in GetRevenueAnalytics with active subscription base price aggregation
- Add date range filtering for revenue analytics with StartDate and EndDate support
- Add per-plan revenue, subscription count, and average revenue calculations
- Add error handling with partial result fallback for revenue queries
- Replace mock resource performance with event-based performance
- Replace neutral 50.0 score with MCC-to-region mapping logic in calculateRegionScore
- Add mccToRegion function mapping MCC first digit to region codes (EU, NA, AS, OC, AF, SA)
- Add sameRegionGroup function grouping regions into EMEA, AMER, and APAC clusters
- Add 90.0 score for exact MCC region match, 70.0 for same region group, 30.0 for distant regions
- Add MCC range documentation for Europe (2xx), North America (3xx
- Move CreateRule, GetRule, UpdateRule, DeleteRule, ListRules, CalculatePrice, and ApplyRules to pricing_service_crud.go
- Remove duplicate struct and constructor comments from pricing_service.go
- Replace hardcoded discount values in extractDiscountValue with actual rule Actions field parsing
- Add AdjustmentType-based discount calculation for Percentage, Fixed, Multiply, and Override
- Replace TODO comments with context.WithValue calls injecting tenant_id in ProcessBilling
- Add tenant context injection in ConvertAmount for tenant-specific exchange rates
- Add tenant context injection in GetBillingHistory for repository-level filtering
- Add tenant context injection in CalculateTotalBilling for scoped calculations
- Update comments to reflect context-based isolation strategy
- Replace mock logging with actual database persistence in UpdateCarrierMetrics
- Add carrier record timestamp update with updated_at field
- Add carrier_metrics table insertion with JSON-serialized metrics data
- Add metricsRecord struct with CarrierID, MetricsData, and RecordedAt fields
- Add zero-division protection for success rate calculation
- Update logging to use structured fields with WithField
- Add ProcessRefund implementation with negative billing entry for refunds and transaction ID fallback
- Add GetBillingAnalytics implementation with date range filtering, billing summary calculation, and transaction history
- Add default 30-day date range for analytics with RFC3339 date parsing for custom ranges
- Replace NotImplemented responses with full BillingService integration
- Add updateCarrierWeights implementation with regional and plan-based weight adjustments in carrier_methods.go
- Add calculateRegionalWeightAdjustment helper with usage-based weight scaling and clamping
- Add calculatePlanWeightAdjustment helper with plan usage analysis and adjustment limits
- Add calculateConversionRate helper in pricing_integration.go using discount statistics and active rule ratios
- Add TenantRateLimiter with plan-based rate limits for Free, Basic, Pro, and Enterprise tiers
- Add RateLimit struct with RequestsPerMinute, RequestsPerHour, RequestsPerDay, and BurstSize fields
- Add TenantUsageTracker with sliding window counters for minute, hour, and day tracking
- Add SlidingWindowCounter with Allow and Count methods for time-based request tracking
- Add AllowRequest method with multi-tier rate limit
- Add GenerateRuleID function using nanosecond timestamp
- Add GetCurrentTime helper returning current time
- Add GenerateEventID function with "evt_" prefix and 16-character random string
- Add GenerateRandomString function with alphanumeric charset
- Replace getCurrentTime() calls with id.GetCurrentTime() in pricing_integration.go and pricing_service.go
- Replace generateRuleID() with id.GenerateRuleID() in pricing rule creation
- Replace generateEventID() with id.GenerateEventID() in tenant middleware
- Remove local helper functions: generateRuleID, getCurrentTime, generateEventID, generateRandomString, getCurrentTimestamp
- Remove unused time package imports
- Extract generateHistoryAnalytics helper in selection_handler_methods.go
- Extract generateRecommendations helper in selection_handler_selection.go
- Extract parsePositiveInt helper in rateplan_handlers_analytics.go
- Replace hardcoded URL path with action parameter in ES2Service.sendActivationRequest
- Add TODO comments for wrapCurrencyService and updateCarrierWeights pending implementations
- Fix struct field alignment and formatting in carrier_methods.go
- Add GormPricingRepository with CreateRule, GetRule, UpdateRule, DeleteRule, ListRules, CountRules methods
- Add GetActiveRules, GetRulesByType methods for retrieving active pricing rules by tenant and type
- Add TenantScopedDB wrapper with automatic tenant filtering for tenant-aware database operations
- Implement TenantScopedTransaction with tenant context propagation and automatic filtering
- Move parseAPIRequestEvents, buildResourcePerformance, parseErrorEvents, parseSlowQueryEvents from tenant_analytics_mock.go to tenant_analytics.go
- Update buildUsageByType to fetch usage statistics from repository instead of using mock data
- Add calculateResourceUsageAnalytics helper to calculate analytics from usage records
- Update buildUsageTrends to use repository data with buildUsageTrendData helper
- Update buildUsagePeaks to use repository data with buildUsagePeakData helper
- Add PricingHandler with CreateRule, GetRule, UpdateRule, DeleteRule, ListRules methods
- Add CalculatePrice endpoint for price calculation based on active rules
- Add ApplyRules endpoint for applying specific pricing rules to context
- Add GetAnalytics endpoint for retrieving pricing analytics by tenant
- Add RegisterRoutes method to register pricing routes under /pricing group
- Implement GetTenantDashboard with usage stats, metrics, recent events, and quota status
- Implement GetUsageAnalytics with usage by type, trends, and peaks
- Implement GetPerformanceAnalytics with API performance, resource performance, errors, and slow queries
- Extract helper methods to tenant_analytics_mock.go: parseTimeRange, parseAPIRequestEvent, parseErrorEvent, parseSlowQueryEvent, calculateAPIPerformance, build
- Update BillingSummary.Breakdown field type from map[string]interface{} to map[string]any
- Update Transaction.Metadata field type from map[string]interface{} to map[string]any
- Update RatePlanCurrencyIntegrator subscription and billing metadata to use map[string]any
- Update handler request/response types to use map[string]any (CreateRatePlanRequest, UpdateRatePlanRequest,
- Update RatePlanCurrencyIntegrator to use billingService.ConvertAmount with CurrencyConversionRequest struct instead of exchangeService
- Remove calculateOverageCost method from rateplan_methods.go (moved or deprecated)
- Rename tenant variable to newTenant in CreateTenant to avoid shadowing
- Extract tenant user methods from tenant_user.go to new tenant_user_methods.go file
- Move GormTenantRepository implementation from repository package to tenant package
- Move TenantResourceValidator from repository to tenant package
- Update tenant_aware_repository.go to import tenant package for Tenant and TenantStatusActive types
- Remove duplicate tenant model definitions and helper methods from repository package
- Update ValidateTenant to use tenant.Tenant and tenant.TenantStatusActive types
- Change TenantIntegrationManager.tenantService from Service interface to *services.TenantServiceImpl concrete type
- Change TenantResourceQuotaChecker.tenantService from Service interface to *services.TenantServiceImpl
- Change TenantEventLogger.tenantService from Service interface to *services.TenantServiceImpl
- Update TenantAwareServices fields to use tenant package types (TenantContext, TenantConfig)
- Add TenantAwareCurrencyRepository wrapper with tenant isolation for all currency repository methods
- Add NewTenantAwareCurrencyRepository and WithTenant methods for tenant context management
- Add TenantIntegrationManager with GetTenantAwareServices for tenant validation and configuration
- Add TenantAwareServices struct with tenant context, config, and currency service fields
- Add TenantResource
- Move tenant_aware_repository.go from internal/tenant to internal/repository package
- Move repository.go to tenant_repository.go in internal/repository package
- Add tenant package import for type references in tenant_repository.go
- Update filter type references to use tenant package prefix (TenantFilter, TenantUserFilter, TenantUsageFilter)
- Update return type for GetUsageStats to use tenant.TenantUsageStats
- Add CheckQuota method with quota limit validation, unlimited quota support (-1), and quota exceeded event logging
- Add GetUsageStats with resource breakdown, quota status calculation, warning/critical thresholds, and active user counting
- Add UpdateUsage with automatic usage record creation and existing record updates
- Add GetQuotaStatus, GetTenantConfig, UpdateTenantConfig, Get
- Add GormTenantRepository struct with GORM database field
- Add CreateTenant, GetTenant, GetTenantByDomain, UpdateTenant, DeleteTenant methods with context support
- Add ListTenants and CountTenants with filtering by ID, name, domain, status, plan, sorting, and pagination
- Add CreateTenantUser, GetTenantUser, UpdateTenantUser, DeleteTenantUser methods for user management
- Add ListTenantUsers and
- Add TenantMiddleware struct with tenant service and logger fields
- Add ExtractTenantFromHeader and ExtractTenantFromAPIKey methods for tenant identification from headers, subdomains, and API keys
- Add RequireTenant middleware with header and API key extraction fallback and tenant access validation
- Add RequireTenantRole middleware with role-based access control for multiple required roles
- Add Repository interface with tenant CRUD, user management, API keys, usage tracking, config, and event operations
- Add Service interface with tenant management, user operations, API key handling, quota checking, config management, authentication, and analytics methods
- Add Middleware interface with request extraction, access validation, context injection, rate limiting, and resource isolation
- Add TenantAwareCurrencyRepository wrapper with tenant isolation for all currency repository methods
- Add NewTenantAwareCurrencyRepository and WithTenant methods for tenant context management
- Add TenantIntegrationManager with GetTenantAwareServices for tenant validation and configuration
- Add TenantAwareServices struct with tenant context, config, and currency service fields
- Add TenantResourceQuotaChecker
- Add TenantFilter with ID, name, domain, status, plan, pagination, and sorting fields
- Add CreateTenantRequest, UpdateTenantRequest with plan, limits, settings, and metadata support
- Add TenantUserFilter, CreateTenantUserRequest, UpdateTenantUserRequest with role and status management
- Add CreateAPIKeyRequest, UpdateAPIKeyRequest with permissions, rate limits, and expiration support
- Add TenantUs
- Add TenantAnalyticsService struct with repository, metrics collector, event publisher, and logger fields
- Add GetTenantDashboard with usage stats, metrics, recent events, and quota status aggregation
- Add GetTenantMetrics with active users, request tracking, error rate calculation, response time analysis, and health score computation
- Add GetUsageAnalytics with time range filtering, resource type breakdown
- Update CurrencyHandler.exchangeService field from *currency.ExchangeRateService to currency.ExchangeRateService interface
- Update NewCurrencyHandler parameter from *currency.ExchangeRateService to currency.ExchangeRateService interface
- Update RatePlanHandler.service field from *rateplan.Service to rateplan.Service interface
- Update NewRatePlanHandler parameter from *rateplan.Service to rateplan.Service interface
- Update Service struct to use repository.Repository interface
- Update all method signatures to use repository package types (RatePlan, RatePlanSubscription, RatePlanUsage, etc.)
- Update filter and request types to use repository package (RatePlanFilter, SubscriptionFilter, CalculateCostRequest, etc.)
- Update status constants to use repository package (SubscriptionStatusActive, PlanStatusActive, DiscountTypePercentage, DiscountTypeFixed)
- Rename internal/service to internal/services in carrier-connector
- Update service imports in selection_integration.go and smdp_integration.go
- Move currency repository files from internal/currency to internal/repository
- Move rate plan repository files from internal/rateplan to internal/repository
- Update package declarations and imports for currency domain types
- Add currency package imports
- Add CurrencyHandler struct with billing service, exchange service, and logger fields
- Add ConvertCurrency endpoint with JSON binding and amount conversion support
- Add GetExchangeRate endpoint with currency pair path parameters
- Add ProcessBilling endpoint with billing request validation and transaction processing
- Add GetBillingHistory with profile ID filtering, date range, limit, and offset support
- Add GormRepository with CRUD operations for currencies, exchange rates, and transactions
- Add repository helper methods for model-to-domain conversions with JSON metadata handling
- Add GetHistoricalRates with date range filtering and chronological ordering
- Add ListExchangeRates with currency pair, active status, and date range filtering
- Add CreateTransaction, GetTransaction, UpdateTransaction, and List
- Add RatePlanCurrencyIntegrator struct with billing service, exchange service, rate plan service, logger, and base currency fields
- Add NewRatePlanCurrencyIntegrator constructor with dependency injection
- Add SubscribeToPlanWithCurrency with price conversion, subscription creation, and initial billing processing
- Add CalculatePlanCostInCurrency with base cost calculation
- Move Repository, ExchangeRateProvider, BillingService, and AnalyticsService interfaces from types.go to new interface.go
- Move BillingSummary and CurrencyUsageStats structs to interface.go
- Move CurrencyModel, ExchangeRateModel, and TransactionModel to new models.go
- Move GORM hooks (BeforeCreate, BeforeUpdate) and TableName methods to models.go
- Remove redundant comments from exchange_rate_service.go
- Add ExchangeRateService struct with repository, logger, providers, and base currency fields
- Add NewExchangeRateService constructor and AddProvider for provider registration
- Add GetExchangeRate with repository caching, provider fallback, and same-currency handling
- Add ConvertAmount wrapper with exchange rate retrieval and amount calculation
- Add RefreshRates with multi-provider rate
- Add BillingServiceImpl struct with repository, exchange service, logger, and base currency fields
- Add NewBillingService constructor with dependency injection
- Add ProcessBilling with request validation, currency conversion, transaction creation, and payment processing
- Add ConvertAmount wrapper delegating to exchange service
- Add GetBillingHistory with profile ID filtering and transaction retries
- Add currencies.json with USD, EUR, GBP, JPY, CAD, AUD, CHF, CNY, INR, BRL, MXN, SEK, NOK, DKK, SGD, HKD, NZD, ZAR, KRW, and TRY configurations
- Add currency metadata with code, name, symbol, decimal places, active status, and supported regions
- Add regional mappings for currency support across multiple countries and territories
- Move GetUsage, GetUsageHistory, GetUsageAnalytics, GetRevenueAnalytics, and GetPopularPlans to service_analytics.go
- Move validateRatePlan, validateSubscribeRequest, calculateNextBillingDate, and calculateCycleEnd to service_methods.go
- Move SubscribeToPlan, GetSubscription, UpdateSubscription, CancelSubscription, GetActiveSubscription, and ListSubscriptions to service_subscriptions.go
- Move RecordUsage to service_usage.go
- Add GormCarrierRepository struct with database and logger fields
- Add CarrierModel with ID, name, MCC, MNC, country code, active status, priority, ES2 config, capabilities, and timestamp fields
- Add GetCarriers with active carrier filtering and model-to-carrier conversion
- Add GetCarrier with ID lookup and not found handling
- Add SaveCarrier with upsert logic for create or update operations
- Add GormRepository struct with database and logger fields
- Add CreateRatePlan, GetRatePlan, UpdateRatePlan, and DeleteRatePlan with automatic timestamp handling
- Add ListRatePlans with carrier, region, plan type, status, price range, and validity filtering
- Add CountRatePlans with comprehensive filter support
- Add CreateSubscription, GetSubscription, UpdateSubscription, and DeleteSubscription with timestamp
- Move RatePlan struct from types.go to types_core.go
- Move PlanType enum with prepaid, postpaid, hybrid, pay-as-you-go, and unlimited options to types_core.go
- Move PlanStatus enum with draft, active, inactive, and archived states to types_core.go
- Move BillingCycle enum with daily, weekly, monthly, quarterly, and yearly options to types_core.go
- Add documentation comments for PlanType, PlanStatus, and BillingCycle enums
- Remove PlanStatusSuspended from PlanStatus enum
- Move calculateDataOverage, calculateVoiceOverage, calculateSMSOverage, calculateDiscounts, and calculateRecommendedPrice to price_calculation.go
- Remove validation helper methods from pricing_engine.go
- Remove PriceOptimization and CostBreakdown type definitions
- Update Logger interface to use `any` instead of `interface{}`
- Remove inline comments throughout pricing_engine.go
- Add switch statement for discount type handling in calculateDiscounts
- Add Repository interface with rate plan CRUD, subscription management, usage tracking, and analytics operations
- Add GORM table name methods for RatePlan, RatePlanSubscription, and RatePlanUsage models
- Add GORM hooks with automatic timestamp handling for BeforeCreate and BeforeUpdate operations
- Add SearchCriteria with carrier, region, plan type, price range, pagination, and sorting fields
- Add CarrierSelectionIntegrator struct with rate plan repository, SMDP manager, and logger fields
- Add GetOptimalCarrierWithRatePlan with region filtering, carrier grouping, performance scoring, and combined evaluation
- Add RecommendRatePlansForCarrier with carrier validation, active plan filtering, and recommendation creation
- Add UpdateCarrierSelectionCriteria with 30-day usage analytics
- Add Service struct with repository and logger fields
- Add CreateRatePlan with ID generation, validation, and comprehensive field checks
- Add GetRatePlan, UpdateRatePlan, and DeleteRatePlan with active subscription conflict detection
- Add ListRatePlans and SearchRatePlans with filtering and sorting support
- Add SubscribeToPlan with plan availability validation, duplicate subscription
- Add RatePlanHandler struct with service and logger fields
- Add CreateRatePlan with JSON binding, draft status initialization, and comprehensive field mapping
- Add GetRatePlan with ID path parameter extraction and not found handling
- Add UpdateRatePlan with selective field updates and existing plan retrieval
- Add DeleteRatePlan with active subscription conflict detection
- Add ListRatePlans with carrier
- Add AnalyticsResponse struct with success, message, and data fields
- Add GetUsageAnalytics with date range parsing, default last month period, and group by support
- Add GetRevenueAnalytics with RFC3339 date parsing and configurable filters
- Add GetPopularPlans with configurable limit defaulting to 10
- Add GetDashboardData aggregating top 5 popular plans, 30-day usage analytics, and revenue analytics
- Add PricingEngine struct with repository and logger fields
- Add ValidateRatePlan with comprehensive validation for fields, dates, allowances, overage rates, discounts, and early termination
- Add CalculateOptimalPrice with market analysis and recommended pricing based on competitor data
- Add ValidateSubscription with plan availability, validity dates, and discount validation
- Add CalculateSubscriptionCost with base
- Rename ListProfilesHandlerWithRepo to ListProfilesHandler
- Rename GetProfileHandlerWithRepo to GetProfileHandler
- Rename DeleteProfileHandlerWithRepo to DeleteProfileHandler
- Move SetupCarriers method from selection_integration.go to new setup_carriers.go file
- Remove redundant comments from SelectionIntegration struct and methods
- Clean up inline comments in RunDemo method while preserving functionality
- Split profile_handlers.go into profile_handlers_core.go, profile_handlers_management_core.go, and profile_handlers_management_delete.go
- Simplify OrderProfileHandlerWithRepo with ICCID/IMSI-only validation and "downloaded" state
- Remove webhook and message queue notifications from order handler
- Add UpdateProfileHandler with state validation for downloaded/activated/deactivated/expired
- Add DeleteProfileHandler with existence
- Add SelectionIntegration struct with manager, selection service, handler, and SMDP service fields
- Add NewSelectionIntegration constructor with default manager config and 30s health checks
- Add SetupCarriers with AT&T, Verizon, T-Mobile DE, and Orange FR configurations
- Add StartServer method with health endpoint and 30s read/write timeouts
- Add StartHealthChecking wrapper for background
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