refactor: replace print statements with logging for better error tracking

backend/open_webui/models/models.py

@@ -166,7 +166,7 @@ class ModelsTable:
                 else:
                     return None
         except Exception as e:
-            print(e)
+            log.exception(f"Failed to insert a new model: {e}")
             return None
 
     def get_all_models(self) -> list[ModelModel]:
@@ -246,8 +246,7 @@ class ModelsTable:
                 db.refresh(model)
                 return ModelModel.model_validate(model)
         except Exception as e:
-            print(e)
-
+            log.exception(f"Failed to update the model by id {id}: {e}")
             return None
 
     def delete_model_by_id(self, id: str) -> bool: