Reach-Scan Evidence and Reproducibility Archive for Existence Is Not Reachability

Machine-readable evidence and reproducibility archive for the Existence Is Not Reachability publication family. Contains canonical evidence rows, raw public rows, constructors, run ledgers, verification tools, governance receipts, publication-source snapshots, public software snapshots, and compatibility metadata for Core Article v1.1-RC18 (DOI 10.5281/zenodo.21249688), Full Technical Report v0.9.34 (reserved DOI 10.5281/zenodo.21249725, forthcoming), and reachscan software v0.3.5 (DOI 10.5281/zenodo.20837723). This archive version (v1.1-RC18, DOI 10.5281/zenodo.21249695) adds the r007 sampler-contract ablation and the r008 and r010 cross-model portability run packages.