docs: def valid_usaf_id_or_raise(usaf_id):
      """ Check if USAF ID is valid and raise eeweather.UnrecognizedUSAFIDError if not. """
      conn = metadata_db_connection_proxy.get_connection()
      cur = conn.cursor()
  
      cur.execute(
          """
        select exists (
          select
            usaf_id
          from
            isd_station_metadata
          where
            usaf_id = ?
        )
      """,
          (usaf_id,),
      )
      (exists,) = cur.fetchone()
      if exists:
          return True
      else:
          raise UnrecognizedUSAFIDError(usaf_id)