Add per-node action groups with schedules, runs, and logs.

Let operators manage ordered action groups on each host, run them manually or on a schedule over SSH, and inspect disk-backed JSON run logs from a node detail UI.

service/cmd/server/main.go

@@ -36,9 +36,10 @@ func main() {
 
 	listenHost := settings.ListenHost(configDir)
 	listenAddr := listenHost + ":" + port
+	handler, app := api.NewRouterWithApp(configDir)
 	server := &http.Server{
 		Addr:              listenAddr,
-		Handler:           api.NewRouter(configDir),
+		Handler:           handler,
 		ReadHeaderTimeout: 5 * time.Second,
 	}
 
@@ -53,6 +54,10 @@ func main() {
 	signal.Notify(stopSignals, syscall.SIGINT, syscall.SIGTERM)
 	<-stopSignals
 
+	if app.Executor != nil {
+		app.Executor.StopScheduler()
+	}
+
 	shutdownContext, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()