docs: retire backup-pathway reading (post-revision honest update; recovery does not survive revised nothing-removed standard)

scope note: tt1 training-depth artifacts now included

tt1 family (bind1_tt1_s0..s9) per-item predictions and reports — training-depth study artifacts (part 2)

tt1 family (bind1_tt1_s0..s9) per-item predictions and reports — training-depth study artifacts

full evaluation artifacts: entry + ablation families, per-item predictions, analysis tooling (part 2)

full evaluation artifacts: entry + ablation families, per-item predictions, analysis tooling

initial commit