V.D297 — σ₈ τ-Native

σ₈^(τ) = σ₈^(CMB)·f_supp = 0.811×0.913 = 0.741. S₈^(τ) = 0.741·√(0.3151/0.3) = 0.760. Aligns with weak lensing (DES Y3, KiDS-1000, HSC-Y3), not CMB-derived S₈=0.832.