- Add CHECK constraint migration for users.role (super_admin, oversight_admin, agency_admin, basic_user)
- Add get_current_db_user dependency resolving Azure claims to User ORM with agency
- Add require_role() factory and require_write_access() dependency
- Auto-promote dev user to super_admin when DISABLE_AUTH=true
- Add /api/me, PUT /api/users/{id}, POST /api/agencies endpoints
- Apply agency-based data filtering on campaigns, analytics, audit routes
- Block oversight_admin from all mutation routes (campaigns, proofs, flags, resolves)
- Restrict dropdown option mutations to super_admin only
- Add role check in WebSocket handler to block oversight_admin from analysis
- Add CurrentUserResponse, UserUpdate, AgencyCreate schemas
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>