A cross-layer workflow passes unit tests but breaks when client, API, and persistence state arrive in a different order. The affected area is feature flags.
Repair the feature flags activity stream implementation so it splits activity after the configured inactivity gap and counts sessions per actor.
Evidence
- Affected surface: Full-stack frontend focus / feature flags.
- Observed failure family: sessionize event activity.
- Scope policy: zoneState must equal healthy.