graphdb: pass context to IsPublicNode

lnrpc/invoicesrpc/interfaces.go

@@ -18,5 +18,5 @@ type GraphSource interface {
 	// IsPublicNode is a helper method that determines whether the node with
 	// the given public key is seen as a public node in the graph from the
 	// graph's source node's point of view.
-	IsPublicNode(pubKey [33]byte) (bool, error)
+	IsPublicNode(ctx context.Context, pubKey [33]byte) (bool, error)
 }