{
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      "code": "low_tier",
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      "message_short": "LOW tier (direct straddle)",
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      "metrics": {}
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    {
      "code": "rejected",
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      "target_key": "2027-03-30",
      "message_short": "Rejected: insufficient_strikes",
      "message_long": "Expiry rejected: insufficient_strikes",
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    {
      "code": "baseline_thin",
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      "message_short": "LOW confidence",
      "message_long": "Event confidence: LOW (baseline not robust)",
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        "confidence": "LOW"
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    },
    {
      "code": "baseline_thin",
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    },
    {
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      "target_key": "06-16\u219206-23",
      "message_short": "LOW confidence",
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        "confidence": "LOW"
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    },
    {
      "code": "baseline_fallback",
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      "target_key": "06-23\u219206-30",
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    {
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        "confidence": "LOW"
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    },
    {
      "code": "low_source",
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      "strike": null,
      "target_key": "06-30\u219207-28",
      "message_short": "LOW confidence",
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      "metrics": {
        "confidence": "LOW"
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    },
    {
      "code": "baseline_fallback",
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      "interval_to": "2026-08-25",
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      "target_key": "07-28\u219208-25",
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      "code": "low_coverage",
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    "build_metadata": {
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      "notes": "UI clamps horizon; avoid LEAPS/illiquid expiries beyond 8 weeks"
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      "source": "market_calendar.list_upcoming_events",
      "id_namespace": "market_calendar",
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}