graph/db: thread context through FilterChannelRange

graph/db/kv_store.go

@@ -2817,7 +2817,7 @@ type BlockChannelRange struct {
 // up after a period of time offline. If withTimestamps is true then the
 // timestamp info of the latest received channel update messages of the channel
 // will be included in the response.
-func (c *KVStore) FilterChannelRange(startHeight,
+func (c *KVStore) FilterChannelRange(_ context.Context, startHeight,
 	endHeight uint32, withTimestamps bool) ([]BlockChannelRange, error) {
 
 	startChanID := &lnwire.ShortChannelID{