fix: improve logging and error visibility, move Story 1.7 to Epic 2

Fixes:
- Added database connection logging with masked DSN
- Added migration progress logging
- Added HTTP server startup logging with address
- Fixed database provider to accept logger parameter
- Improved error visibility throughout initialization

Documentation:
- Moved Story 1.7 (Service Client Interfaces) to Epic 2 as Story 2.7
- Updated Epic 1 and Epic 2 READMEs
- Updated COMPLETE_TASK_LIST.md
- Updated story metadata (ID, Epic, Dependencies)

These changes will help diagnose startup issues and provide better visibility into what the application is doing.

docs/content/stories/epic2/README.md

@@ -35,6 +35,11 @@ Implement complete JWT-based authentication system, build comprehensive identity
 - **Goal:** Provide database seeding functionality to create initial admin user, default roles, and core permissions.
 - **Deliverables:** Seed script, seed command, integration with application startup
 
+### 2.7 Service Client Interfaces
+- [Story: 2.7 - Service Client Interfaces](./2.7-service-abstraction-layer.md) (moved from Epic 1)
+- **Goal:** Create service client interfaces for all core services to enable microservices communication.
+- **Deliverables:** Service client interfaces, service factory, configuration
+
 ## Deliverables Checklist
 - [ ] JWT authentication with access/refresh tokens
 - [ ] User CRUD with email verification