A cross-layer workflow passes unit tests but breaks when client, API, and persistence state arrive in a different order. The affected area is migration rollout.
Repair the migration rollout tests implementation so it classifies stable, flaky, and consistently failing tests from repeated independent runs.
Evidence
- Affected surface: Full-stack backend focus / migration rollout.
- Observed failure family: triage an unreliable test suite.
- Scope policy: qualityState must equal verified.