A production rollout exposes a contract mismatch between the UI boundary and the owning service. The affected area is migration rollout.
Repair the migration rollout dependency calls implementation so it retries transient failures with bounded exponential delays and stops permanent failures.
Evidence
- Affected surface: Full-stack backend focus / migration rollout.
- Observed failure family: plan bounded retries.
- Scope policy: qualityState must equal verified.