Exact-Triad Split Family, Rank-Asymmetric Blind Spot, and Top-k Truncation Collapse in a Computational Longevity Discovery Pipeline (Trinity Claims #64-#68, 2026-03-20)

This version fixes a new discovery-pipeline blind-spot milestone from the Trinity computational longevity-discovery pipeline. Claims #64-#68 establish the TOP3A/RMI2/CCDC69 system as the unique exact-triad split family, show outsider-only bifurcation between stable RMI1 and fracture PITRM1 states on the same fixed core, localize a veto activation boundary for split-family visibility, and show that candidate-ranking and standard top-k truncation preserve only the stable half of the family while suppressing the fracture half. This version contains the milestone package for Claims #63-#68 and the supporting phase reports, summaries, and rejection logic. This is a computational discovery package and not a completed causal validation study.