docs: def column_describe(table_name, col_name):
      """
      Return summary statistics of a column as JSON.
      Uses Pandas' "split" JSON format.
  
      """
      col_desc = orca.get_table(table_name).get_column(col_name).describe()
      return (
          col_desc.to_json(orient='split'),
          200,
          {'Content-Type': 'application/json'})