IV.R45 — Part IV Reflection Summary

Four conclusions: (1) geometry survives (τ³, ι_τ, T² unchanged), (2) grounding is new (coherence kernel, address obstruction, earned constants), (3) precision is new (m_e at 0.025 ppm, complete EW table), (4) donut is earned (theorem, not intuition). Closes Part IV before strong sector opens in Part V.