- Added `AuthorizationService` and its implementation `AuthorizationServiceImpl` to handle permission checks across various services.
- Refactored `AlbumServiceImpl`, `MediaServiceImpl`, `PersonServiceImpl`, and `TagServiceImpl` to utilize the new authorization service for permission checks.
- Removed direct permission checks from services and replaced them with calls to the `AuthorizationService`.
- Updated repository interfaces to include new methods for checking media permissions in shared albums.
- Enhanced the `authz` module with new permission types for better granularity in access control.
- Adjusted the `AppState` struct to include the new `authorization_service`.
- Added `Person` and `Tag` models to the core library.
- Created `PersonService` and `TagService` traits with implementations for managing persons and tags.
- Introduced repositories for `Person`, `Tag`, `FaceRegion`, and `PersonShare` with PostgreSQL support.
- Updated authorization logic to include permissions for accessing and editing persons.
- Enhanced the schema to support new models and relationships.
- Implemented database migrations for new tables related to persons and tags.
- Added request and response structures for API interactions with persons and tags.
