feat: Implement task and reward tracking feature

- Added tracking events for tasks, penalties, and rewards with timestamps.
- Created new TinyDB table for tracking records to maintain audit history.
- Developed backend API for querying tracking events with filters and pagination.
- Implemented logging for tracking events with per-user rotating log files.
- Added unit tests for tracking event creation, querying, and anonymization.
- Deferred frontend changes for future implementation.
- Established acceptance criteria and documentation for the tracking feature.

feat: Introduce account deletion scheduler

- Implemented a scheduler to delete accounts marked for deletion after a configurable threshold.
- Added new fields to the User model to manage deletion status and attempts.
- Created admin API endpoints for managing deletion thresholds and viewing the deletion queue.
- Integrated error handling and logging for the deletion process.
- Developed unit tests for the deletion scheduler and related API endpoints.
- Documented the deletion process and acceptance criteria.

backend/config/paths.py

@@ -33,3 +33,9 @@ def get_user_image_dir(username: str | None) -> str:
     if username:
         return os.path.join(PROJECT_ROOT, get_base_data_dir(), 'images', username)
     return os.path.join(PROJECT_ROOT, 'resources', 'images')
+
+def get_logs_dir() -> str:
+    """
+    Return the absolute directory path for application logs.
+    """
+    return os.path.join(PROJECT_ROOT, 'logs')