feat(messages): limit message edit window to 7 days

app/messages/service.py

@@ -1,4 +1,5 @@
 import json
+from datetime import datetime, timedelta, timezone
 
 from fastapi import HTTPException, status
 from sqlalchemy.exc import IntegrityError
@@ -189,6 +190,15 @@ async def update_message(
     await ensure_chat_membership(db, chat_id=message.chat_id, user_id=user_id)
     if message.sender_id != user_id:
         raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="You can edit only your own messages")
+    created_at = message.created_at
+    if created_at.tzinfo is None:
+        created_at = created_at.replace(tzinfo=timezone.utc)
+    edit_deadline = created_at + timedelta(days=7)
+    if datetime.now(timezone.utc) > edit_deadline:
+        raise HTTPException(
+            status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
+            detail="Message can only be edited within 7 days",
+        )
     message.text = payload.text
     await db.commit()
     await db.refresh(message)