Add tabular dataset diff by key#291
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The framework diffed screens/snapshots but had nothing to diff two tabular row-sets by key — the standard "what changed between yesterday's and today's extract" report. Add diff_rows (added/removed/changed/ unchanged, composite keys, last-write-wins on duplicates), cell_changes, and summarize_diff. Wired through facade, executor (AC_diff_rows / AC_cell_changes), MCP, and the Script Builder with a headless test batch and EN/Zh docs.
Up to standards ✅🟢 Issues
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| Metric | Results |
|---|---|
| Complexity | 46 |
| Duplication | 0 |
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What
Adds a CDC-style row-set diff. The framework diffed screens/snapshots but had nothing to diff two tabular row-sets by key.
diff_rows(old, new, key)→{added, removed, changed, unchanged}(changed carries{key, old, new}); supports a single column or composite key list; last-write-wins on duplicate keys.cell_changes(old, new, key)→[{key, column, old, new}].summarize_diff(diff)→ bucket counts.Layers
utils/dataset_diff/(pure stdlib, zero PySide6).__all__.AC_diff_rows,AC_cell_changes.ac_diff_rows,ac_cell_changes(read-only).test/unit_test/headless/test_dataset_diff_batch.py(9 tests, no Qt).v83_features_doc.rst(EN + Zh) + toctrees + 3 README What's-new sections.Verification
pytest test/unit_test/headless/test_dataset_diff_batch.py→ 9 passed.ruff check je_auto_control/clean; pylint 10.00/10; bandit clean; radon CC clean.