fix(api): remove obsolete validation call in PUT handler

The PUT handler in routes/api/v1/data/[id]/index.dart contained a manual check for user_content_preferences that called the old checkUpdatePreferences method, which has been removed. This caused a compile-time error.

This change removes the obsolete if block. The validation logic is now correctly and exclusively handled by the custom updater for user_content_preferences within the DataOperationRegistry, which was implemented in a previous step. This resolves the error and ensures the correct validation path is used.

Author: fulleni

routes/api/v1/data/[id]/index.dart

@@ -7,7 +7,6 @@ import 'package:flutter_news_app_api_server_full_source_code/src/middlewares/own
 import 'package:flutter_news_app_api_server_full_source_code/src/rbac/permission_service.dart';
 import 'package:flutter_news_app_api_server_full_source_code/src/registry/data_operation_registry.dart';
 import 'package:flutter_news_app_api_server_full_source_code/src/registry/model_registry.dart';
-import 'package:flutter_news_app_api_server_full_source_code/src/services/user_preference_limit_service.dart';
 import 'package:logging/logging.dart';
 
 // Create a logger for this file.
@@ -57,7 +56,6 @@ Future<Response> _handlePut(RequestContext context, String id) async {
   final modelConfig = context.read<ModelConfig<dynamic>>();
   final authenticatedUser = context.read<User?>();
   final permissionService = context.read<PermissionService>();
-  final userPreferenceLimitService = context.read<UserPreferenceLimitService>();
 
   _logger.info('Handling PUT request for model "$modelName", id "$id".');
 
@@ -105,28 +103,6 @@ Future<Response> _handlePut(RequestContext context, String id) async {
     }
   }
 
-  if (modelName == 'user_content_preferences') {
-    // User content preferences can only be updated by an authenticated user.
-    if (authenticatedUser == null) {
-      throw const UnauthorizedException(
-        'Authentication required to update user content preferences.',
-      );
-    }
-    if (itemToUpdate is UserContentPreferences) {
-      await userPreferenceLimitService.checkUpdatePreferences(
-        authenticatedUser,
-        itemToUpdate,
-      );
-    } else {
-      _logger.severe(
-        'Type Error: Expected UserContentPreferences for limit check, but got ${itemToUpdate.runtimeType}.',
-      );
-      throw const OperationFailedException(
-        'Internal Server Error: Model type mismatch for limit check.',
-      );
-    }
-  }
-
   final userIdForRepoCall = _getUserIdForRepoCall(
     modelConfig: modelConfig,
     permissionService: permissionService,