fix: recognize clean one-shot completions in health gate and drift (#1691)

* fix: recognize clean one-shot completions in health gate and drift

Treat exit 0 with restart policy no/absent as successful completion so
init and migration jobs no longer fail post-update observation or show as
service-missing, while long-running restart policies still fail closed.

* fix: ignore residual health on clean one-shots and honor deploy.restart_policy

Completed exit-0 jobs with no-restart intent no longer fail the health gate on leftover starting/unhealthy state, and Drift treats deploy.restart_policy with Compose precedence so any/on-failure services are not mistaken for one-shots.

* fix: require explicit Compose restart no for one-shot recognition

Docker inspect reports restart no for both intentional jobs and bare services that omit restart, so Health Gate and Drift now require declared restart:""no"" (or deploy.restart_policy condition none) and load Compose intent once per gate.

backend/src/helpers/composeDependencyParse.ts

@@ -26,6 +26,8 @@ export interface DeclaredService {
   image?: string;
   /** Service `network_mode:` as declared (e.g. `host`), or undefined. */
   networkMode?: string;
+  /** Service `restart` from raw YAML parse. The effective-model path may set this via normalizeComposeRestartIntent (including deploy.restart_policy). Null when unset. */
+  restart?: string | null;
 }
 
 /** A top-level networks:/volumes: entry. */
@@ -200,6 +202,7 @@ export function parseComposeDependencies(content: string): DeclaredCompose {
       ports,
       image: asString(svc.image),
       networkMode: asString(svc.network_mode),
+      restart: asString(svc.restart) ?? null,
     });
   }