message: fix(api): handle undefined column type_generic
diff: @@ -310,7 +310,7 @@ class BaseDatasource(
  filtered_columns: List[Column] = []
  column_types: Set[GenericDataType] = set()
  for column in data["columns"]:
  - generic_type = column["type_generic"]
  + generic_type = column.get("type_generic")
  if generic_type is not None:
  column_types.add(generic_type)
  if column["column_name"] in column_names:
  