OptionalbuildOn-device build outcome for a remote-build (build.mode: remote) compose
workload (Phase 5b) — status, duration, and a bounded failure log tail.
OptionalobservedThe release version this device has actually realized (absent until its first convergence report, and on older backends).
OptionalreasonWhy state diverges from reportedState (timeout / health signal / failureReason).
Per-device effective deployment status (backend rollup).