graph/db: thread context through NodeUpdatesInHorizon

discovery/chan_series.go

@@ -181,7 +181,8 @@ func (c *ChanSeries) UpdatesInHorizon(chain chainhash.Hash,
 		// update within the horizon as well. We send these second to
 		// ensure that they follow any active channels they have.
 		nodeAnnsInHorizon := c.graph.NodeUpdatesInHorizon(
-			startTime, endTime, graphdb.WithIterPublicNodesOnly(),
+			context.TODO(), startTime, endTime,
+			graphdb.WithIterPublicNodesOnly(),
 		)
 		for nodeAnn, err := range nodeAnnsInHorizon {
 			if err != nil {