BasinGraph reproducibility data: prospective holdouts and registered evidence extensions

Version 3.1.0 extends the original BasinGraph reproducibility record, whose v2.0.0 files retain the prospective COCO/BBOB and CUTEst holdouts. This new evidence package contains the disjoint registered Track A-D/C extensions: a 1,920-run mechanism ablation, a 3,840-run modern-baseline comparison, a 1,440-run 40-320-dimensional bbob-largescale comparison, a 60-run sequential optimizer-overhead probe, and a 2,310-run scientific-model and NIST observed-data matrix with 18 separate task-specific reference results. It also contains raw return archives, observer or detailed logs, independently derived analyses, validation reports, source identities, a 20-sheet Source Data workbook, Supplementary Information, publication figures, figure-decomposition slides, claim-boundary documentation and a unified SHA-256 manifest. Favourable, null and unfavourable outcomes are retained.