test(reader): full coverage for LazyRunEnd*Array families + RunEndArrays#79
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Add Byte/Short/Bool dispatch (were 0–40%) plus Int forEach/fold, varying the run-ends array type (Byte/Short/Int/Long) to cover RunEndArrays.readRunEnd, and exercise the walkRuns edges: zero-length run (duplicate run-end) and length extending past the last run-end. Covers the unsupported-run-ends default arm too. 100% line + branch across all five records and the shared helper. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Add Byte/Short/Bool dispatch (were 0–40%) plus Int forEach/fold, varying the
run-ends array type (Byte/Short/Int/Long) to cover RunEndArrays.readRunEnd, and
exercise the walkRuns edges: zero-length run (duplicate run-end) and length
extending past the last run-end. Covers the unsupported-run-ends default arm too.
100% line + branch across all five records and the shared helper.
Co-Authored-By: Claude Opus 4.8 noreply@anthropic.com