Health checks and resource limits are claimed but not implemented

[Alimedhat000]

Summary

Long-lived app containers have no Docker Healthcheck and no enforced memory or build-timeout limits, despite CONTEXT.md documenting "container memory (2GB), build timeout (15 min)".

Evidence

• runLongLived() (packages/worker/src/infrastructure/docker/docker-runner.ts:336) sets only RestartPolicy: { Name: "unless-stopped" } — no Healthcheck (line 353).
• create() supports Memory + a kill timeout (docker-runner.ts:229) but is never called by any build-pack strategy.
• buildTimeout (packages/shared/src/schema.ts:83, default 900) is surfaced by the API but never read by the worker.

Scope

• Add a Docker Healthcheck (TCP/HTTP probe on the app port).
• Actually pass memory and build-timeout limits through the build path, or remove the claims from CONTEXT.md (see the CONTEXT.md stale-docs issue).