feat: RBAC Rollen & Rechte (Phase 1 - Datenmodell, Roles-Verwaltung, Guard-Infrastruktur)

Replaces the fixed 5-value Role enum with a database-driven Role/Permission
model: admins can create custom roles with a precise per-resource/action
permission set (83-key code-owned catalog), instead of being locked to
ADMIN/BEEKEEPER/STAFF/READONLY/API_CLIENT.

- New Role/Permission/RolePermission tables; legacy Role enum renamed to
  LegacyRole and kept as User.legacyRole so all existing @Roles() call
  sites keep working unchanged during the migration.
- New RolesController/RolesService (CRUD, permission-set editing,
  deactivate/reactivate) with lockout-prevention invariants: system roles
  (ADMIN) can't be edited or deactivated, and a role still assigned to
  users can't be deactivated.
- New PermissionResolverService (30s-cached, DB-fresh per user) and
  PermissionsGuard + @RequirePermission(), registered as an additional
  APP_GUARD alongside the legacy RolesGuard so both systems run
  side-by-side until controllers are migrated in Phase 2.
- PermissionCatalogSyncService seeds any new catalog entries into the DB
  on boot, so future features only touch the TS catalog.
- New GET /auth/me returns the caller's role and effective permissions.
- Migration hand-written (destructive column rename) with grants derived
  from a fresh grep of every existing @Roles() call site, verified
  against 5 controllers read in full for STAFF's exact write boundary.
- test/roles.e2e-spec.ts covers the new endpoints and invariants end to
  end; test/authorization-coverage.e2e-spec.ts added but skipped until
  Phase 2 gives every controller a @RequirePermission.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

ApiCore-Backend/src/auth/auth.service.spec.ts

@@ -18,11 +18,12 @@ describe('AuthService', () => {
   };
   let jwtService: { sign: jest.Mock };
   let auditLog: { record: jest.Mock };
+  let permissionResolver: { getPermissions: jest.Mock };
 
   const activeUser = {
     id: 'user-1',
     email: '[email protected]',
-    role: 'STAFF',
+    legacyRole: 'STAFF',
     isActive: true,
     passwordHash: '',
   };
@@ -40,12 +41,16 @@ describe('AuthService', () => {
     };
     jwtService = { sign: jest.fn().mockReturnValue('signed.jwt.token') };
     auditLog = { record: jest.fn().mockResolvedValue(undefined) };
+    permissionResolver = {
+      getPermissions: jest.fn().mockResolvedValue(new Set()),
+    };
 
     authService = new AuthService(
       usersService as unknown as UsersService,
       prisma as unknown as PrismaService,
       jwtService as never,
       auditLog as unknown as AuditLogService,
+      permissionResolver as never,
     );
   });