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{"EventId":"sigma-positive-002","Timestamp":"2026-08-25T10:15:00Z","Hostname":"build-04.example","EventSource":"course-fixture","EventAction":"toy_release_review","Marker":"NORTHSTAR_RELEASE_REVIEW","CandidateVersion":"4.2.2-course","ProvenanceState":"builder-identity-review","ExpectedMatch":true,"SyntheticOnly":true}