Simplify access control from 500+ lines to ~50 lines of core logic:
- New permission bitmask (PermRead/Write/Delete/Manage)
- Hierarchical access (dossier → category → entry)
- Single choke points: CheckAccess(), EntryQuery(), DossierQuery()
- All data access now enforced through lib RBAC layer
- Removed complex role templates and permission caching
Also improved NewID() to use UUID v4 + SHA-256 hash for better
randomness distribution (was limited to 0-7 hex start).
Net -210 lines across 28 files. Ready for staging deployment.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
6486a52ad9