- Add ChargingHandler struct with ChargingEngineClient dependency
- Add NewChargingHandler constructor
- Add CheckCredit endpoint to validate sufficient credit for requested bytes
- Add GetBalance endpoint to retrieve current balance for an IP
- Add AddCredit endpoint to add bytes to an IP's credit
- Add DeductCredit endpoint to deduct bytes from an IP's credit
- Add IP parameter validation and JSON request binding
- Add fmt import and fix X-RateLimit-Limit header conversion from rune to string in ratelimit middleware
- Fix whitespace alignment for rate limiter variable declarations and JSON error responses
- Update mock expectations in redis_ratelimit_test to use explicit argument type matchers
- Add severity validation check in alerting_test rule validation
- Fix health_test assertions for degraded/unhealthy counts
- Add PaymentController struct with paymentService/db dependencies and NewPaymentController constructor
- Add SetupRoutes with /payments endpoints (POST /top-up, POST/DELETE/GET /payment-methods, GET /transactions/:id, POST /transactions/:id/refund) and /webhooks/stripe endpoint
- Add ProcessTopUp handler with amount/paymentMethodId validation, subscriberID authentication, and PaymentService.
- Move StripeGateway struct from stripe.go to types.go
- Move PaymentRequest/PaymentResponse/CustomerResponse/RefundResponse/PaymentStatusResponse/WebhookEvent/InvoiceItem/InvoiceResponse structs to types.go
- Remove encoding/json import from stripe.go (moved to types.go)
- Remove PaymentRequest comment from types.go for consistency with other type definitions
- Remove all method implementations from subscriber.go (CreateSubscriber/GetSubscriber/GetSubscriberByIMSI/UpdateSubscriber/SuspendSubscriber/TerminateSubscriber/ListSubscribers/terminateSubscriberSessions/GetAccount/ListInvoices/GetInvoice/ListRatingPlans/GetRatingPlan/ListAlerts/SearchSubscribers/ResolveAlert/CreateAlert and all other methods)
- Update SubscriberService struct comment
- Replace fmt.Appendf with json.Marshal for structured log output
- Add logData map with level/type/method/path/query/response_time/status/user_agent/ip/timestamp fields
- Update logSlowRequest to output JSON-formatted logs with newline terminator for better log parsing and monitoring integration
- Add RedisClientInterface with Eval/Del/ZCount methods for Redis operation abstraction
- Update RedisRateLimiter/NewRedisRateLimiter/NewMultiTierRateLimiter to accept RedisClientInterface instead of concrete redis.Client
- Update MockRedisClient.Eval to properly construct call arguments with script and keys
- Update MockRedisClient.Del to accept keys as slice instead of variadic parameters
- Add ResponseWriterWrapper struct with gin.ResponseWriter and body buffer fields to capture response content
- Add Write method to ResponseWriterWrapper that captures response body while writing to original writer
- Add Body method to ResponseWriterWrapper that returns captured response bytes
- Update ContentBasedETagMiddleware to wrap response writer with ResponseWriterWrapper before calling
- Add TestSetup struct with DB/Router/AuthService/test users/JWT tokens for test environment initialization
- Add setupTest function with SQLite in-memory database, user/plugin/automation/config/auth session migrations, and test user creation with admin/operator/viewer/user roles
- Add makeRequest helper for authenticated HTTP requests with Bearer token and JSON body support
- Add AuthConfig struct with JWTSecret field to config package
- Add Auth field to Config struct with JSON tag for authentication settings
- Add JWT_SECRET to Auth config with default value "change-me-in-production"
- Replace MONGODB_URI with DATABASE_URL using PostgreSQL connection string in .env.example
- Add categorized sections in .env.example: Database/Server/Authentication/
- Add AlertSeverity enum with info/warning/critical levels and AlertStatus enum with firing/resolved/silenced states
- Add Alert struct with id/name/description/severity/status/timestamp/labels/annotations/last_evaluated fields
- Add AlertRule struct with id/name/description/severity/query/threshold/duration/labels/enabled fields for rule definitions
- Add AlertManager struct with rules
- Add HealthStatus enum with healthy/degraded/unhealthy states and HealthCheck struct with name/status/message/last_checked/response_time/metadata fields
- Add SystemHealth struct with status/timestamp/uptime/version/environment/checks/summary fields and HealthSummary with total/healthy/degraded/unhealthy counts
- Add HealthMonitor struct with checks map, mutex, startTime, version, env fields
- Add User struct with username/email/password/first_name/last_name/role/is_active/last_login fields and GORM tags
- Add Role struct with name/description/permissions many2many relationship and GORM tags
- Add Permission struct with name/resource/action/description fields for RBAC
- Add AuthSession struct with user_id/token/refresh_token/expires_at/ip_address/user_agent/is_active fields
- Add APIKey struct with name
- Add ServicesHandler with List/Get/Restart/Start/Stop/Scale/Logs/Health/PodStatus/Events methods and Kubernetes service integration
- Add MonitoringHandler with Metrics/Alerts/Health/Logs methods and Prometheus service integration
- Add DeploymentsHandler with Status/Start/Rollback/History methods and deployment service integration
- Add PluginsHandler with List
- Replace map[string]interface{} with map[string]any in GraphQL, metrics, payment gateway, and webhook handlers
- Replace []byte(fmt.Sprintf()) with fmt.Appendf(nil, ...) for cursor encoding in GraphQL resolvers and tests
- Replace strings.HasPrefix/TrimPrefix with strings.CutPrefix for webhook signature parsing
- Replace stripe.Int64/Bool with new() constructor for Stripe payment parameters
- Rename Error
- Add auth_test.go with setupTestDB/setupAuthService helpers using SQLite in-memory database and GORM AutoMigrate
- Add TestAuthService_Register with duplicate username/email validation and invalid role handling
- Add TestAuthService_Login with invalid username/password checks and inactive user validation
- Add TestJWTService_GenerateToken with database session verification and token storage validation
- Add TestJWTService_ValidateToken with invalid
- Add AutomationService struct with database dependency and NewAutomationService constructor
- Add AutomationFilter struct with enabled/type fields for filtering automations
- Add List method with enabled/type filtering, created_at DESC ordering, and context support
- Add Get method with ID lookup, gorm.ErrRecordNotFound handling, and error wrapping
- Add CreateAutomationInput struct with name/description/type/enabled
- Add AuthHandler struct with authService dependency and NewAuthHandler constructor
- Add LoginRequest/LoginResponse/RegisterRequest/ChangePasswordRequest structs with validation tags
- Add Login method with username/password validation, token generation, and user response
- Add Register method with email/password/role validation and user creation
- Add RefreshToken method with JWT refresh token validation
- Add CachedDatabase struct wrapping Database with cache.Cache field and NewCachedDatabase constructor
- Add CachedFind method with cache key generation from query/args, cache hit deserialization, database fallback on miss, and 5-minute TTL
- Add CachedFirst method with same caching pattern as CachedFind for single record queries
- Add InvalidateCache method for clearing all cache entries and InvalidateCacheKey
- Add ConfigStoreService struct with database dependency and NewConfigStoreService constructor
- Add List method with optional section filtering, section/key ordering, and sensitive value masking (********)
- Add UpsertConfigInput struct with section/key/value/type/sensitive/description/updated_by fields and required validation
- Add Upsert method with section+key lookup, default
- Add error code constants for validation/auth/resource/system/business logic errors (VALIDATION_FAILED/UNAUTHORIZED/NOT_FOUND/INTERNAL_ERROR/etc)
- Add EnhancedErrorResponse with error/code/details/context/timestamp/request_id fields and ValidationErrorResponse with field-specific errors array
- Add handleError function with gorm.ErrRecordNotFound/ErrDuplicatedKey/ErrInvalidData handling
- Add CasbinService struct with enforcer/db fields and NewCasbinService constructor with GORM adapter initialization
- Add Casbin model configuration with request_definition/policy_definition/role_definition/policy_effect/matchers for RBAC
- Add initializeDefaultPolicies with admin (full access), operator (manage services/monitoring), and viewer (read-only) role permissions
- Add CheckPermission method
- Replace interface{} with any in sendDeactivationRequest method signature in es2_helpers.go
- Add plugin_service_test.go with setupPluginTest helper using in-memory SQLite and gorm.AutoMigrate
- Add TestPluginService_List with test cases for all/enabled/disabled/by-type filtering and no matches
- Add TestPluginService_Install with tests for successful install, duplicate prevention, and missing fields
- Add Subscriber model with IMSI/MSISDN/email/status/plan_id/profile_status fields and validation examples
- Add Service model with name/namespace/replicas/ready_replicas/available_replicas/creation_timestamp fields
- Add Deployment model with service/version/status/started_at/completed_at/metadata fields and status enum
- Add Plugin model with name/version/author/description/enabled/config fields
- Add Automation model with name/description/trigger/
- Add DeploymentService struct with database dependency and NewDeploymentService constructor
- Add DeploymentFilter struct with Service/Environment/Status/Limit/Offset fields for query filtering
- Add List method with context support, filter application (service/environment/status), pagination (default limit: 20), and DESC ordering by created_at
- Add Get method with gorm.ErrRecordNotFound handling and formatted
- Add websocket.Upgrader with CheckOrigin allowing all origins in development
- Add Message struct with type/data/timestamp fields for WebSocket messages
- Add Client struct with conn/send/mutex/closed fields and readPump/writePump/Close methods
- Add Hub struct with clients map, broadcast/register/unregister channels, and sync.RWMutex
- Add NewHub constructor and Run method with client registration/
- Add PluginService struct with database dependency and NewPluginService constructor
- Add PluginFilter struct with Enabled/Type/Category fields for query filtering
- Add List method with context support, filter application (enabled/type/category), and DESC ordering by installed_at
- Add Get method with gorm.ErrRecordNotFound handling and formatted error messages
- Add InstallPluginInput struct with name/
- Add PrometheusService struct with baseURL/http.Client (10s timeout) and PROMETHEUS_URL env config (default: http://prometheus:9090)
- Add Available method with /-/ready endpoint health check
- Add Query method with instant PromQL execution via /api/v1/query, URL escaping, error handling
- Add promResponse/promVectorData/PromVectorSample structs for query result parsing with metric/value fields
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