- Added 5 new service methods for complete database coverage:
* get_series_without_nfo()
* count_all()
* count_with_nfo()
* count_with_tmdb_id()
* count_with_tvdb_id()
- Eliminated all direct database queries from business logic:
* series_manager_service.py - now uses AnimeSeriesService
* anime_service.py - now uses service layer methods
- Documented architecture decision in ARCHITECTURE.md:
* Service layer IS the repository layer
* No direct SQLAlchemy queries allowed outside service layer
- All database access must go through service methods
- 1449 tests passing, repository pattern enforced
- SeriesApp now passes skip_load=True to SerieList
- Prevents redundant data file loading on every startup
- Series loaded once during setup via sync_series_from_data_files()
- Removed obsolete _init_list_sync() and _init_list() methods
- Updated documentation in ARCHITECTURE.md and README.md
- Add WebSocket shutdown() with client notification and graceful close
- Enhance download service stop() with pending state persistence
- Expand FastAPI lifespan shutdown with proper cleanup sequence
- Add SQLite WAL checkpoint before database close
- Update stop_server.sh to use SIGTERM with timeout fallback
- Configure uvicorn timeout_graceful_shutdown=30s
- Update ARCHITECTURE.md with shutdown documentation
