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 command handling implementation so it accepts first operations, recognizes safe repeats, and rejects key reuse with a different payload.
Evidence
- Affected surface: Cloud-native full-stack / observability API.
- Observed failure family: enforce idempotent operations.
- Scope policy: zoneState must equal healthy.