Deleted the entire `ws` library and its associated files. This likely reflects a move away from the WebSocket library, possibly signaling an alternate implementation or unused/legacy code cleanup.
- Introduced Redis-backed caching for user and subuser permission evaluations in the `route_t` trait, reducing database queries.
- Enhanced `Redis` class with methods for permission caching: `cache_permission`, `get_permission`, and `clear_permission`.
- Added test coverage for the new caching logic in `PermissionRedisCacheTest.php`.
- Implemented Redis caching for authentication sessions with `cache_auth_session`, `get_auth_session`, and `clear_auth_session`.
- Improved CORS handling for preflight requests in `index.php`.
Jeppe Bundgaard