The Kerr-Newman Information-Geometry Master Formula: Unification of Spin and Charge Suppression in the D3 Framework

We derive the Kerr-Newman (KN) generalisation of the D3 information-geometry framework. Define σ = √(1−χ²−q²). The master suppression factor is h(χ,q) = 4σ/(2(1+σ)−q²). The key identity σ²+χ²=1−q² collapses the KN denominator exactly, generalising the Paper 2 identity s²+χ²=1 to the charged case. All previous results are exact special cases: h(χ,0)=f(χ) [Paper 2], h(0,q)=g(q) [Paper 6], h(0,0)=1 [Papers 1,3]. Total evaporation displacement R_total(KN)=h(χ,q)·r_s exactly. Five constants cancel (M, ℏ, k_B, ln2, π). The KN metric is the most general four-dimensional black hole — this is the most general result possible in the D3 framework. The series is complete.