V.D255 — Baryon Loading Parameter from tau-Native omega_b

Baryon loading R_b(z_rec) = 31.5 * omega_b * (T/2.7)^(-4) / (z/1000) = 0.615. From tau-native omega_b = 0.02209. Controls odd/even CMB peak asymmetry: compression (1+R_b) vs rarefaction (1-R_b). Zero free parameters beyond tau inputs + T_CMB.