Initial commit: add .gitignore and README

docs/changelog/archive/MODULARIZATION_PROGRESS.md

@@ -0,0 +1,84 @@
+# Modularization Progress Report
+
+## Completed Tasks ✅
+
+### Phase 1: Foundation (COMPLETED)
+
+1. ✅ **Core Interfaces Created**
+   - `/src/core/interfaces/repositories/` - All repository interfaces
+   - `/src/core/interfaces/services/` - All service interfaces
+   - Clean exports via index.ts files
+
+2. ✅ **Repository Implementations**
+   - `PaymentRepository` - Full CRUD for payments
+   - `MessageRepository` - ISO message data access
+   - `OperatorRepository` - Operator management
+   - `SettlementRepository` - Settlement tracking
+
+3. ✅ **Services Converted to Instance-Based with DI**
+   - `MessageService` - Now uses repositories, accepts dependencies via constructor
+   - `TransportService` - Now accepts IMessageService via constructor
+   - `LedgerService` - Now uses PaymentRepository, accepts adapter via constructor
+   - `ScreeningService` - New instance-based service (replaces ScreeningEngine)
+
+4. ✅ **Simple DI Container**
+   - `ServiceContainer` class for service registration and resolution
+   - Factory pattern support
+
+## In Progress 🔄
+
+### Phase 2: Core Orchestration
+
+- **PaymentWorkflow** - Needs to be refactored to accept all services via constructor
+- **DI Container Setup** - Need to wire all services together
+- **Route Updates** - Update route handlers to use DI container
+
+## Remaining Tasks 📋
+
+### Critical
+1. **Refactor PaymentWorkflow** 
+   - Accept all services via constructor (ILedgerService, IMessageService, ITransportService, IScreeningService)
+   - Replace direct database queries with repository calls
+   - Update all static method calls
+
+2. **Update Route Handlers**
+   - Wire services via DI container
+   - Update PaymentWorkflow instantiation
+   - Update all static service calls
+
+3. **Create Service Initialization**
+   - Setup function to initialize all repositories
+   - Setup function to initialize all services
+   - Wire dependencies correctly
+
+### Important
+4. **Add Index Files**
+   - Create index.ts files for all modules for clean exports
+   - Update imports to use path aliases consistently
+
+5. **Testing**
+   - Update existing tests to use new structure
+   - Create mock repositories for testing
+
+## Migration Notes
+
+- Old static `ScreeningEngine` is preserved for backward compatibility
+- New `ScreeningService` provides instance-based implementation
+- All services now implement their respective interfaces
+- Repository pattern separates data access from business logic
+
+## Breaking Changes
+
+⚠️ **Services are no longer static** - All service methods must be called on instances
+⚠️ **Constructor injection required** - Services must be instantiated with dependencies
+⚠️ **Repository pattern** - Database queries are now in repositories, not services
+
+## Next Steps
+
+1. Complete PaymentWorkflow refactoring
+2. Create service initialization/bootstrap file
+3. Update app.ts to use DI container
+4. Update all route files
+5. Test thoroughly
+6. Update documentation
+