A production rollout exposes a contract mismatch between the UI boundary and the owning service. The affected area is observability API.
Repair the observability API dependency protection implementation so it opens only after the failure threshold and calculates a deterministic retry time.
Evidence
- Affected surface: Cloud-native full-stack / observability API.
- Observed failure family: calculate circuit-breaker state.
- Scope policy: zoneState must equal healthy.