Masked-Veto Structural Blind Spot, Zero-Retention Quartet Class, and No Native Fracture Channel in a Computational Longevity Discovery Pipeline (Trinity Claims #64-#71, 2026-03-20)

This version fixes a structural blind-spot milestone from the Trinity computational longevity-discovery pipeline. Claims #64-#71 establish the unique exact-triad split family TOP3A/RMI2/CCDC69, outsider-only bifurcation between stable RMI1 and fracture PITRM1 states, a local veto activation boundary, rank-asymmetric family blindness, top-k collapse into a false stable-only family, avg-pair versus veto aliasing inside quartet-space, a broader masked-veto quartet class with zero retention in standard top-k universes, and the absence of a native fracture channel in the candidate law itself. This package contains the cumulative milestone reports, claim documents, summaries, and concise wet-lab-facing descriptions for the masked-veto structural blind-spot freeze. This is a computational discovery package and not a completed causal validation study.