GCFT-0425: Weinberg Angle Gate — Literal Renormalization Group Running Audit

A literal stress test of the electroweak running proposed in the GCFT gauge-sector framework. Starting from the original DS-16 boundary conditions, the audit demonstrates that the simplest one-loop bridge fails to reproduce the observed weak mixing angle, encountering a hypercharge pole before reaching the electroweak scale. Rather than rejecting the broader ontology, the paper defines the precise requirements for any future threshold-aware GCFT renormalization group derivation.