graph/db: thread context through ChanUpdatesInHorizon

graph/db/interfaces.go

@@ -255,7 +255,8 @@ type Store interface { //nolint:interfacebloat
 	// ChanUpdatesInHorizon returns all the known channel edges which have
 	// at least one edge that has an update timestamp within the specified
 	// horizon.
-	ChanUpdatesInHorizon(startTime, endTime time.Time,
+	ChanUpdatesInHorizon(ctx context.Context,
+		startTime, endTime time.Time,
 		opts ...IteratorOption) iter.Seq2[ChannelEdge, error]
 
 	// FilterKnownChanIDs takes a set of channel IDs and return the subset