Plan §5 has W2-B emit and W2-C consume `release.resolved`, but EventType / EVENT_PAYLOADS lacked it, so the two parallel subtasks would each invent a payload. Minimal payload: sourceReleaseId, observationId, mediaEntityId, contentUnitIds, evidenceLevel (contracts EvidenceLevel). Co-Authored-By: Claude Fable 5.1 <[email protected]>