V.T54 — 10-Link Derivation Chain

The 10-link derivation chain derives the electron mass from axioms K0-K6 with zero free parameters and one experimental input (m_n): generators -> tau^3 -> Central Theorem -> sectors -> iota_tau -> G -> m_n anchor -> Epstein zeta -> R formula -> m_e = 0.510998937 MeV (0.025 ppm).