- Add ScanRule model with configurable conditions
- Add FileAnalyzer for ffprobe-based media analysis
- Add LibraryScanner with manual, scheduled and watcher modes
- Add LanguageDetector for audio language detection
- Support rule-based filtering with priority evaluation
- Add SQLAlchemy database setup with session management
- Add Job model with status, priority and progress tracking
- Add QueueManager with priority queue and deduplication
- Add SystemSettings model for database-backed configuration
- Add SettingsService with caching and defaults
- Add SystemMonitor for CPU/RAM/GPU resource monitoring
- Add LanguageCode utilities (moved from root)
- Reduce .env.example to only DATABASE_URL
- Simplify backend/config.py to only read database connection
- All other settings now managed via database and Web UI
- Add CLAUDE.md with project architecture and operation modes
- Add backend/README.md with setup and usage instructions
- Add test_backend.py with automated tests for config, database, and queue
- Update requirements.txt with optional dependencies structure
- Update .env.example with all configuration options
- Add backend/config.py with Pydantic settings validation
- Support for standalone, provider, and hybrid operation modes
- Multi-database backend configuration (SQLite/PostgreSQL/MariaDB)
- Environment variable validation with helpful error messages
- Worker and Whisper model configuration
