The ColumnValues returned by items.fetch_items_by_column_value in the response object at data.items_page_by_column_values.items[].column_values have a blank .column attribute, unlike items.fetch_items_by_id, which includes the column information in the returned ColumnValues.
Having the column values is not useful unless we know which column each value belongs to.
I propose adding the following at https://github.com/mondaycom/monday-api-python-sdk/blob/master/src/monday_sdk/query_templates.py#L254