feat(federation): add room sync and deletion notification endpoints for federated instances
fix(federation): handle room deletion and update settings during sync process
feat(federation): enhance FederatedRoomCard and FederatedRoomDetail components to display deleted rooms
i18n: add translations for room deletion messages in English and German
- Escape XML and HTML special characters to prevent injection attacks.
- Implement rate limiting for various endpoints to mitigate abuse.
- Add validation for email formats, password lengths, and field limits.
- Ensure proper access control for recordings and room management.
