- SQLAlchemy session management
* Implemented proper session handling
* Fixed `DetachedInstanceError` issues and added helper method `_get_detached_resource` for consistent session management
* Improved transaction handling with commits and rollbacks
- New features
* Added cache statistics with `get_stats()` method
* Implemented resource tagging
* Added cache size management
* Added support for file compression
* Added resource validation with checksums
* Improved search
* Added metadata export/import functionality