Two queries: per-test p50/p90 regression ordered by largest median delta,
plus a per-package roll-up of total wall-time and quantile shifts. Filters
to passed tests so flakes don't skew medians. Run with `duckdb < test/
analysis/bench-tests-diff.sql` against two CSVs produced by `cargo dev
bench-tests`.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
