{
  "cards_total": 2500,
  "grouped_by": "source_card_id",
  "schema": "aurelia.runtime.three_way_split_report.v1",
  "seed": "phase14-qwen35-08b-corpus-v2-full",
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      "records": 3390
    },
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      "records": 30060
    },
    "val": {
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      "records": 4050
    }
  },
  "test_fraction": 0.1,
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  "val_fraction": 0.1
}