HELIXNID / V-Helix: A Closed-Bridge 1849-Cell Evidence System for Experimental Mathematics

Submit-ready external-review draft for the HELIXNID / V-Helix closed-bridge evidence archive. The record includes the N=127 alpha-decay residual-ridge materials, source data, derived data, result locks, provenance ledgers, formal files, reproducibility scripts, and the HELIXNID / V-Helix Closed-Bridge External Review Ledger. Core fixed objects: V_HELIX = pi / ln^2(4,370,125), n_v = 4,370,125, fixed 43 x 43 grid, and 1849-cell routing architecture. Claims in the review ledger are connected to archived files, replay materials, ledgers, tests, grids, scores, or Zenodo evidence items.