feat(services): sleep mode — scale-to-zero on idle, wake on traffic

Services gain sleep_enabled + sleep_idle_minutes. A 30s sweeper tracks
container NetworkIO deltas; a flat counter for the configured window
scales the service to zero (status=sleeping, workload containers removed).

While slept, a busybox wake container takes over the service's Traefik
host rule at priority 100: it serves a self-reloading "waking" page and
calls the unauthenticated idempotent GET/POST /api/v1/internal/wake/:id,
which reconciles the service back to running. Wake placeholders carry a
dedicated label (containr.wake-for) so runtime state never counts them;
the sweeper prunes them once the workload is up. The wake URL resolves
the API via its container name when containerized, else the edge
network's IPAM gateway — bare-metal installs need HOST=0.0.0.0 for the
callback.

Surfaces: PUT fields on services, POST /services/:id/sleep|wake,
CLI --sleep/--sleep-idle + services sleep|wake, 2 MCP tools (89 total),
OpenAPI paths/schema, and a Settings > Sleep card with toggle, idle
minutes, and manual sleep/wake plus a Sleeping badge.

Verified live: idle sweep scaled whoami-web to zero; the wake container
served the page on the edge network and its callback woke the service
(container recreated, status running, placeholder pruned).

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

app/backend/internal/cli/commands/services.go

@@ -195,6 +195,14 @@ var servicesUpdateCmd = &cobra.Command{
 			}
 			body["volumes"] = volumes
 		}
+		if cmd.Flags().Changed("sleep") {
+			v, _ := cmd.Flags().GetBool("sleep")
+			body["sleep_enabled"] = v
+		}
+		if cmd.Flags().Changed("sleep-idle") {
+			v, _ := cmd.Flags().GetInt("sleep-idle")
+			body["sleep_idle_minutes"] = v
+		}
 		if cmd.Flags().Changed("maintenance") {
 			v, _ := cmd.Flags().GetString("maintenance")
 			body["maintenance_mode"] = v == "on" || v == "true"
@@ -504,8 +512,10 @@ func init() {
 	uf.String("memory-reserve", "", "soft memory reservation (empty clears)")
 	uf.String("static-cmd", "", "build command for the static builder (empty clears)")
 	uf.String("static-dir", "", "output dir for the static builder (empty clears)")
+	uf.Bool("sleep", false, "enable scale-to-zero on idle (sleep mode)")
+	uf.Int("sleep-idle", 0, "idle minutes before sleeping (1-1440)")
 
-	for _, a := range []string{"start", "stop", "restart", "redeploy"} {
+	for _, a := range []string{"start", "stop", "restart", "redeploy", "sleep", "wake"} {
 		verb := a
 		ServicesCmd.AddCommand(&cobra.Command{
 			Use:   verb + " <id>",