docs: def get_meta(request, pid):
      """MNRead.getSystemMetadata(session, pid) → SystemMetadata."""
      d1_gmn.app.event_log.log_read_event(pid, request)
      return django.http.HttpResponse(
          d1_gmn.app.views.util.generate_sysmeta_xml_matching_api_version(request, pid),
          d1_common.const.CONTENT_TYPE_XML,
      )