- Added ModelMetadataProvider and CivitaiModelMetadataProvider for handling model metadata.
- Introduced SQLiteModelMetadataProvider for SQLite database integration.
- Created metadata_service.py to initialize and configure metadata providers.
- Updated CivitaiClient to register as a metadata provider.
- Refactored download_manager to use the new download_file method.
- Added SQL schema for models, model_versions, and model_files.
- Updated requirements.txt to include aiosqlite.
- Added new dependencies: piexif, Pillow, and requests to enhance image processing and HTTP request capabilities.
- Ensured consistency between pyproject.toml and requirements.txt by including the same set of dependencies.