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      "subject_kind": "check",
      "subject": "supplychain-malware",
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      "from_value": "pass",
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      "materiality": "security",
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      "source": "scan",
      "summary": "Malware scan (pass → unverified)",
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      "occurred_at": "2026-07-31 08:44:49.581945+00",
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      "source": "scan",
      "summary": "Provenance (unverified → fail)",
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