🎨 Edit Pin files field to precise type

app/models/pin.py

@@ -1,4 +1,4 @@
-from typing import Optional
+from typing import Optional, List
 from pydantic import BaseModel
 
 class Pin(BaseModel):
@@ -6,5 +6,5 @@ class Pin(BaseModel):
     title: str
     description: str
     location: list 
-    files: Optional[list]
+    files: Optional[List[str]] = []  # Liste des IDs d'images
     user_id: str