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lakehouse/auditor 2 blocking issues: cloud: claim not backed — "proven review pathways."
Before: `base_rows = pre_filter_rows - delta_count` subtracted a FILE count (delta_batches.len()) from a ROW count (pre_filter_rows), producing a meaningless "rough" approximation the comment acknowledged. Now: base_rows is captured directly from the pre-extend state. Same for delta_rows, which now reports actual delta row count instead of file count. Workspace baseline warnings unchanged at 11. Flagged by scrum iter 4-7 as a PRD §8.6 contract gap (upsert semantics); this closes the reporting half. Full dedup work remains queued. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>