Remove anonymization-procedure section from README

Update README schema for dropped columns

Drop never-populated columns from tournaments: per_round_sim_distances, per_round_sim_distance_stds, simulations_absent_rounds

Update README: document published schema (JSON-string columns, flattened usage, slim simulations), add v1.2 Codex ablation notes, drop stale file references

Add GPT-5.5 Codex ablations (v1.2): 150 tournaments, low/high reasoning effort across 5 arenas; normalize empty-marker encoding in JSON columns

Update readme

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Remove stray script

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initial commit