Query Analysis v4

This subtree stores the current overlap-9 v4 analysis snapshot used for cross-version rank-stability work.

Included run

runs/rankstab_v4_full_20260506

Scope

9 datasets
overlap set with v3 and the v2 comparison pipeline

The full analysis_query_scores__all_datasets.jsonl file is intentionally not duplicated here because it is large; the summary tables and manifest are included.