refactor: Userservice

services/index.ts

@@ -5,6 +5,9 @@
 // Database services (server-only)
 export { getPool, closePool } from "./database";
 
+// User services (server-only)
+export { UserService, userService } from "./user-service";
+
 // Evaluation services (server-only)
 export { EvaluationService, evaluationService } from "./evaluation-service";