Shared Integration Smoke

This lane probes company-managed shared runtime assets.

Do not add local Docker or testcontainers smoke here.
Use shared endpoints or runtime asset selectors only.
Keep probes read-only and host-safe.
Preferred first-class surfaces:
- playwrightgrid
- langboard
- other shared cluster services exposed through topology/runtime bindings

Regenerate nothing from here. These are live/shared integration probes.