fix(backend): add missing kind definition for admin endpoints to improve security

packages/backend/src/server/api/endpoints/admin/roles/update-default-policies.ts

@@ -11,6 +11,8 @@ import { MetaService } from '@/core/MetaService.js';
 export const meta = {
 	tags: ['admin', 'role'],
 
+	kind: 'write:admin',
+
 	requireCredential: true,
 	requireAdmin: true,
 } as const;