Cache optimization with automatic expiration:
1. New Cache Structure:
- Changed from simple array to TTL-aware structure
- Each entry: ['data' => ..., 'expires' => timestamp]
- 5-minute (300s) TTL prevents indefinite stale data
2. Helper Methods:
- getCached($key): Returns data if not expired, null otherwise
- setCached($key, $data): Stores with expiration timestamp
- invalidateCache($userId, $username): Manual cache clearing
3. Updated All Cache Access Points:
- syncUserFromAuthelia() - User sync from Authelia
- getSystemUser() - System user for daemon operations
- getUserById() - User lookup by ID
- getUserByUsername() - User lookup by username
Benefits:
- Prevents memory leaks from unlimited cache growth
- Ensures user data refreshes periodically
- Maintains performance benefits of caching
- Automatic cleanup of expired entries
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
