jedarden b201f0ff58 P12.OP4: Finalize score normalization validation — RRF τ=0.14, score τ=0.79 ... Research complete: both score-based and RRF merge fail 0.95 threshold. Updated research doc with full RRF validation results and confidence intervals. Added benchmark result reports and helper tests. Follow-up bead miroir-n6v created for global-IDF preflight (dfs_query_then_fetch pattern). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>		2026-04-19 02:40:54 -04:00
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benches/score-comparability	P12.OP4: Finalize score normalization validation — RRF τ=0.14, score τ=0.79	2026-04-19 02:40:54 -04:00