GCFT-0430: Trace-Neutral Electroweak Split — Coefficient Ratio and Profile Boundaries for the Blinded SM-G02 Kernel

This paper derives the minimal trace-neutral electroweak coefficient ratio for the symbolic kernel introduced in GCFT-0429. The work reduces two independent split coefficients to a single free scale using the minimal trace-neutral deformation while leaving the overall magnitude, Xi profile evolution, and electroweak endpoint blinded. The publication advances the derivation without numerical endpoint fitting or Standard Model promotion.