Update app.py

app.py

@@ -15,6 +15,7 @@ from pydantic import BaseModel
 import threading
 import uuid
 import random
+from enum import Enum  # ← ADD THIS MISSING IMPORT
 
 # External OCI API URL
 OCI_API_BASE_URL = "https://yukee1992-oci-story-book.hf.space"