bfc68b7ec6
Decomposes P_e(T'_{f'}, k) into fibers over spoke configurations σ,
specializes to the menagerie §6 formula when there are no spokes, and
sets up the cross-tire compatibility step on shared boundary spokes.
Includes brute-force-verified worked example on C_4 with four pendants.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>