V.T139 — Vacuum energy is exactly zero

The tau-vacuum energy is rho_vac^tau = 0 (exact). The vacuum character chi_0 in H_partial[omega] has zero energy readout because: the profinite spectrum has no zero-point energy (each depth contributes a discrete character, not a continuous mode), and the ground-state character is uniquely determined by the coherence kernel with zero energy by construction.