Add mcp dns and mcp node routes commands

mcp dns queries MCNS via an agent to list all zones and DNS records.
mcp node routes queries mc-proxy on each node for listener/route status,
matching the mcproxyctl status output format.

New agent RPCs: ListDNSRecords, ListProxyRoutes.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cmd/mcp/node.go

@@ -40,10 +40,62 @@ func nodeCmd() *cobra.Command {
 		RunE:  runNodeRemove,
 	}
 
-	cmd.AddCommand(list, add, remove)
+	routes := &cobra.Command{
+		Use:   "routes",
+		Short: "List mc-proxy routes on all nodes",
+		RunE:  runNodeRoutes,
+	}
+
+	cmd.AddCommand(list, add, remove, routes)
 	return cmd
 }
 
+func runNodeRoutes(_ *cobra.Command, _ []string) error {
+	first := true
+	return forEachNode(func(node config.NodeConfig, client mcpv1.McpAgentServiceClient) error {
+		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+
+		resp, err := client.ListProxyRoutes(ctx, &mcpv1.ListProxyRoutesRequest{})
+		if err != nil {
+			_, _ = fmt.Fprintf(os.Stderr, "warning: %s: list routes: %v\n", node.Name, err)
+			return nil
+		}
+
+		if !first {
+			fmt.Println()
+		}
+		first = false
+
+		fmt.Printf("NODE: %s\n", node.Name)
+		fmt.Printf("mc-proxy %s\n", resp.GetVersion())
+		if resp.GetStartedAt() != nil {
+			uptime := time.Since(resp.GetStartedAt().AsTime()).Truncate(time.Second)
+			fmt.Printf("uptime:      %s\n", uptime)
+		}
+		fmt.Printf("connections: %d\n", resp.GetTotalConnections())
+		fmt.Println()
+
+		for _, ls := range resp.GetListeners() {
+			fmt.Printf("  %s  routes=%d  active=%d\n",
+				ls.GetAddr(), ls.GetRouteCount(), ls.GetActiveConnections())
+			for _, r := range ls.GetRoutes() {
+				mode := r.GetMode()
+				if mode == "" {
+					mode = "l4"
+				}
+				extra := ""
+				if r.GetBackendTls() {
+					extra = " (re-encrypt)"
+				}
+				fmt.Printf("    %s %s → %s%s\n", mode, r.GetHostname(), r.GetBackend(), extra)
+			}
+		}
+
+		return nil
+	})
+}
+
 func runNodeList(_ *cobra.Command, _ []string) error {
 	cfg, err := config.LoadCLIConfig(cfgPath)
 	if err != nil {