Add authentication, user management, and database migration features

- Implement OAuth 2.0 and PAT authentication methods
- Add user management, roles, and profile functionality
- Add database migrations and admin user scripts
- Update services for authentication and user settings
- Add protected routes and permission hooks
- Update documentation for authentication and database access

backend/src/routes/schema.ts

@@ -4,10 +4,15 @@ import type { ObjectTypeDefinition, AttributeDefinition } from '../generated/jir
 import { dataService } from '../services/dataService.js';
 import { logger } from '../services/logger.js';
 import { jiraAssetsClient } from '../services/jiraAssetsClient.js';
+import { requireAuth, requirePermission } from '../middleware/authorization.js';
 import type { CMDBObjectTypeName } from '../generated/jira-types.js';
 
 const router = Router();
 
+// All routes require authentication and search permission
+router.use(requireAuth);
+router.use(requirePermission('search'));
+
 // Extended types for API response
 interface ObjectTypeWithLinks extends ObjectTypeDefinition {
   incomingLinks: Array<{