MCRO Language Analytics (v3 — comparative + detailed, patched)
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    Focal case: 27-CR-23-1886

    This report excludes focal-only terms, and provides:
      - Detailed other-case tables (case rollups, doc granularity, page-level instances)
      - Wide matrices (terms x other cases/clusters) with quantity, presence, and weights

    Type coercion patch:
      - All merge/pivot keys (`search_group`, `search_term`) are coerced to STRING
        to avoid dtype mismatch errors observed in some corpora.
