- Added `identity_resolution.py` for resolving Wizarr users and identities.
- Created `ingestion.py` to handle recording and updating activity events.
- Introduced `maintenance.py` for cleanup and session management tasks.
- Developed `queries.py` for read-oriented operations on activity sessions.
- Implemented background tasks in `activity.py` for scheduled maintenance.
- Added tests for activity services and blueprint to ensure functionality.
