multi: return verbose errors when fetching edges

server.go

@@ -1266,7 +1266,7 @@ func newServer(cfg *Config, listenAddrs []net.Addr,
 		info, e1, e2, err := s.graphDB.FetchChannelEdgesByID(
 			scid.ToUint64(),
 		)
-		if err == channeldb.ErrEdgeNotFound {
+		if errors.Is(err, channeldb.ErrEdgeNotFound) {
 			// This is unlikely but there is a slim chance of this
 			// being hit if lnd was killed via SIGKILL and the
 			// funding manager was stepping through the delete