Refresh card: tf6/tf7 filename split + paper link

Remove legacy tf6_all_scores.pkl (renamed to tf6_scores.pkl)

Rename tf6_all_scores.pkl -> tf6_scores.pkl (explicit per-hookpoint naming)

Remove legacy all_scores.pkl (renamed to tf7_scores.pkl)

Rename all_scores.pkl -> tf7_scores.pkl (explicit per-hookpoint naming)

Refresh model card with renamed concept

Upload SAE feature-selection scores

initial commit