- 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