docs: def valid_zcta_or_raise(zcta):
      """ Check if ZCTA is valid and raise eeweather.UnrecognizedZCTAError if not. """
      conn = metadata_db_connection_proxy.get_connection()
      cur = conn.cursor()
  
      cur.execute(
          """
        select exists (
          select
            zcta_id
          from
            zcta_metadata
          where
            zcta_id = ?
        )
      """,
          (zcta,),
      )
      (exists,) = cur.fetchone()
      if exists:
          return True
      else:
          raise UnrecognizedZCTAError(zcta)