- Revert accidental Users.RoleId FK change from CASCADE back to SET NULL
- Remove System != 'None' gate in beforeFilter; any authenticated user
can manage their own notifications, per-row ownership checks suffice
- Add allowMethod('post', 'put') guard to edit() for consistent REST behavior
- Change PushState validation from allowEmpty to required=false
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>