CSRF guards added to 16 admin pages that previously accepted POST requests
without token verification (GR-SEC-001): departments, permissions, roles,
settings, tenants, users (create/edit/bulk/tokens), and lang switch.
New contract tests:
- PostEndpointCsrfContractTest: scans all pages/ for POST handlers and
verifies checkCsrfToken is present (API/data endpoints exempt).
- DatabaseUpdatesContractTest: validates db/updates/ scripts follow naming
convention and use idempotent SQL patterns (GR-CORE-010).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
