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      "healthcare.redaction.applied": "true"
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    "hash_algorithm": "SHA-256",
    "canonicalization": "JSON object with event_hash omitted, sorted keys, compact separators",
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    "mcp_audit_path": "benchmark-runs/<run-id>/mcp-audit.jsonl"
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  "costproof": {
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    "route": "local_only",
    "hard_budget_cap_usd": 0.0,
    "estimated_provider_cost_usd": 0.0,
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}