feat: новая функция

backend/db/migrations/010_cleanup_roles.sql

@@ -2,7 +2,7 @@
 DO $$ 
 BEGIN
   IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'user_role') THEN
-    CREATE TYPE user_role AS ENUM ('user', 'admin');
+    CREATE TYPE user_role AS ENUM ('user', 'readonly', 'editor');
   END IF;
 END $$;