fix(sleep): request-triggered wake, create-time config, agent release assets (#62)

- Wake placeholder fired its wake callback unconditionally at boot, so
  sleeping services flapped sleep→wake on every idle timeout. The wake
  call now lives in a CGI script the busybox httpd runs on inbound hits;
  E404 covers non-root paths. URLs/page travel via env, no quoting.
- Wake endpoint tries ordered candidate addresses (self-name on shared
  net, host.docker.internal, edge gateway, probe) — Docker Desktop's VM
  can't reach the bridge gateway, so single-URL wake was dead there.
- CreateServiceRequest accepts sleep_enabled/sleep_idle_minutes and the
  INSERT persists them — previously update-only, silently dropped at
  create. CLI `services create` gains --sleep/--sleep-idle; MCP doc lists
  both; OpenAPI node_id description updated for build-on-node.
- Wake goroutine logs spec/reconcile failures instead of a bare return,
  and marks the service failed when spec build errors.
- scripts/build-cli.sh ships containr-agent-linux-{amd64,arm64} so the
  install-agent.sh GH-releases fallback actually resolves.

Verified live: create-time flags persist and validate (1-1440), service
sleeps on idle and stays asleep, an inbound hit on the placeholder wakes
it (~15s to running), and the placeholder is pruned after reconcile.

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

@@ -117,6 +117,14 @@ var servicesCreateCmd = &cobra.Command{
 		if v, _ := cmd.Flags().GetBool("spread"); v {
 			body["spread"] = v
 		}
+		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 v, _ := cmd.Flags().GetString("placement-tags"); v != "" {
 			tags := []string{}
 			for _, t := range strings.Split(v, ",") {
@@ -520,8 +528,10 @@ func init() {
 	f.String("memory-reserve", "", "soft memory reservation (e.g. 128Mi)")
 	f.String("static-cmd", "", "build command for the static builder")
 	f.String("static-dir", "", "output dir for the static builder (default dist)")
-	f.String("node", "", "pin to a node agent id, or 'auto' for least-loaded (image services only)")
+	f.String("node", "", "pin to a node agent id, or 'auto' for least-loaded")
 	f.Bool("spread", false, "distribute replicas across all online schedulable nodes")
+	f.Bool("sleep", false, "enable scale-to-zero on idle (sleep mode)")
+	f.Int("sleep-idle", 0, "idle minutes before sleeping (1-1440)")
 	f.String("placement-tags", "", "comma-separated node tags required for remote placement (auto/spread only)")
 
 	uf := servicesUpdateCmd.Flags()