feat: use new endpoint to get message status

Author: aliel

src/aleph/sdk/client/http.py

@@ -516,7 +516,7 @@ async def get_program_price(self, item_hash: str) -> PriceResponse:
 
     async def get_message_status(self, item_hash: str) -> MessageStatus:
         """return Status of a message"""
-        async with self.http_session.get(f"/api/v0/messages/{item_hash}") as resp:
+        async with self.http_session.get(f"/api/v0/messages/{item_hash}/status") as resp:
             if resp.status == HTTPNotFound.status_code:
                 raise MessageNotFoundError(f"No such hash {item_hash}")
             resp.raise_for_status()