V.D273 — Weak Lensing Convergence from Boundary Holonomy

Weak lensing convergence κ(θ) = Σ(θ)/Σ_cr where Σ includes baryonic + boundary holonomy surface density. Shear γ related to κ by standard lensing kernel (preserved because τ-Einstein is a metric theory). Convergence power spectrum P_κ(ℓ) via Limber integral with τ-native d_A(z).