MM-62751: [Shared Channels] Allow remote users to be discoverable in the create DM/GM modal (#30918)

server/channels/store/timerlayer/timerlayer.go

@@ -7909,6 +7909,22 @@ func (s *TimerLayerRemoteClusterStore) Update(rc *model.RemoteCluster) (*model.R
 	return result, err
 }
 
+func (s *TimerLayerRemoteClusterStore) UpdateLastGlobalUserSyncAt(remoteID string, syncAt int64) error {
+	start := time.Now()
+
+	err := s.RemoteClusterStore.UpdateLastGlobalUserSyncAt(remoteID, syncAt)
+
+	elapsed := float64(time.Since(start)) / float64(time.Second)
+	if s.Root.Metrics != nil {
+		success := "false"
+		if err == nil {
+			success = "true"
+		}
+		s.Root.Metrics.ObserveStoreMethodDuration("RemoteClusterStore.UpdateLastGlobalUserSyncAt", success, elapsed)
+	}
+	return err
+}
+
 func (s *TimerLayerRemoteClusterStore) UpdateTopics(remoteClusterID string, topics string) (*model.RemoteCluster, error) {
 	start := time.Now()