Paper J: Prime-Shade Duality and Goldbach's Conjecture: The Wästlund Reflection on RP^1

We apply the Wästlund reflection r -> 1/r on the real projective line RP^1 to the arithmetic of Goldbach's conjecture, obtaining three proved results and one conditional chain. (i) We introduce the von Mangoldt weighted Goldbach ratio distribution: for fixed even n, weight each prime pair (p,q) with p+q=n by log(p)log(q) and study the CDF of r=p/q. The Cramér model for this distribution is F_Cr(r) = r/(1+r), the unique CDF satisfying the Wästlund reflection symmetry F(r)+F(1/r)=1 in the continuous setting. (ii) We prove three Cramér-Lambda golden identities: F_Lambda(phi⁻¹) = 2phi⁻² and the Goldbach partition of unity 2phi⁻² + phi⁻³ = 1, together with the universal identity F_C(phi⁻¹) = Cphi⁻² for any Cramér-type distribution F_C(r) = C*r/(1+r). All three proofs are one line from phi^2 = phi+1. (iii) We prove the Goldbach-Wästlund duality theorem: over all pairs (p,q) with p+q=n, the von Mangoldt weighted CDF satisfies F(r)+F(1/r^-) = 1, making F(r) = r/(1+r) the unique CDF consistent with the Wästlund reflection. (iv) We establish a scope theorem: the Pythagorean-Golden duality for consecutive prime gaps does not extend to Goldbach pairs. (v) Conditionally on the equivalence of Form (13) with the Riemann Hypothesis, we derive the chain Form (13) iff kappa=0 iff RH implies G(n) > 0 for all sufficiently large n.