Keep what each machine says of what it runs, raise it, and gate on it (hq ADR 0240, to-be 48 Phase A)

The gate judged a module by what the mesh saw from outside, so a container that
crash-looped after it applied passed it. Each machine's node-engine now states
the health of every long-running resource it runs; the controller keeps the
newest statement per machine, raises module.<module>.<machine>.unhealthy on the
second statement in a row, clears it on the first that does not say it, and the
gate passes a module only when every long-running resource of it is stated
healthy since the send. An engine that states nothing is judged as before.

cmd/mesh-controller/nodes.go

@@ -537,6 +537,17 @@ func showNode(ctx context.Context, inv *inventory.Inventory, name string) error
 		}
 	}
 
+	// What it runs for its modules, and how each is (novox/hq ADR 0240): "is it working" answered without
+	// a terminal on the machine.
+	if h, had, err := inv.HealthOf(ctx, name); err != nil {
+		fmt.Printf("\n  what it says of what it runs could NOT be read: %v\n", err)
+	} else {
+		fmt.Println()
+		for _, line := range healthLines(h, had, time.Now()) {
+			fmt.Println(line)
+		}
+	}
+
 	held, err := inv.Profile(ctx, name)
 	if err != nil {
 		return err