- Remove unused AsyncCommands/error/ChargingSession/ErrorContext imports from credit_management - Remove unused ErrorContext/ChargingError imports from engine - Remove unused ErrorContext import from rating_billing and prefix unused variables with underscore - Remove unused ErrorContext import from rating_plans_repo - Remove unused Context import from errors/helpers - Remove unused info/debug/SystemTime imports from monitoring - Remove unused sleep
- Add ChargingError import from super::types - Add ErrorContext<T> implementation for anyhow::Result<T> with with_context method that maps errors to ChargingError::InternalError with formatted context message
- Remove monitoring/operations.rs with background sync implementation (start_background_sync/perform_sync/cleanup_expired_blocks/update_usage_statistics/check_low_balance_alerts/apply_monthly_fees_if_needed methods) - Remove charging/mod.rs module declaration with types/engine/credit_management/rating_billing submodules and ChargingEngine re-export - Remove errors/mod.rs module declaration with types/helpers
- Move charging module files into charging/ directory (types.rs, engine.rs, credit_management.rs, rating_billing.rs) - Move error module files into errors/ directory (types.rs, helpers.rs) - Create mod.rs files for charging and errors modules with simplified exports - Update import paths to use super:: for intra-module references - Remove charging_new/errors_new aliases and use charging/errors directly - Simplify module