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  "metadata": {
    "timestamp_utc": "2026-08-22T09:05:26Z",
    "platform": "Linux 6.17.0-1022-azure x86_64",
    "cpu_model": "Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz",
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    "requested_participants": 1,
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    "compact_blocking": {"mc": 0, "nc": 0, "kc": 0}
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