test(cli): raise VortexInspectorTui coverage via dict + deep-expand#120
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Adds a single-chunk rich fixture (low-cardinality Utf8 → global dict + an I64 column) and a deep-expand script that visits every node, so the dictionary-preview and data-preview detail panes render. Covers both the synchronous (worker == null) and IoWorker-backed async preview paths. Line coverage 53.3% -> 66.9%, branch 42.9% -> 55.5%. The remaining gaps are defensive error paths and the per-chunk-stats / hex panes, which the current writer never emits a zoned-stats layout to reach. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Adds a single-chunk rich fixture (low-cardinality Utf8 → global dict +
an I64 column) and a deep-expand script that visits every node, so the
dictionary-preview and data-preview detail panes render. Covers both the
synchronous (worker == null) and IoWorker-backed async preview paths.
Line coverage 53.3% -> 66.9%, branch 42.9% -> 55.5%. The remaining gaps
are defensive error paths and the per-chunk-stats / hex panes, which the
current writer never emits a zoned-stats layout to reach.
Co-Authored-By: Claude Opus 4.8 noreply@anthropic.com