CSF-CMT vΩ.25.5: Quantization Boundary Theory — Multi-Scale Coarse-Graining Emergence as the Unification Condition of the Universe

The unification condition of the universe is conventionally sought as a single quantum field theory valid at the Planck scale. This paper proves that such a condition is unattainable within the phenomenological layer because the five fundamental interactions each possess distinct coarse-graining characteristic scales L_c^* at which they emerge from the first-space meta-field ξEO. A rigorous six-entry boundary table is derived: gravity at L_c^* ~ LPlanck (as emergent geometry, not a quantum field), electromagnetism at L_c^* ~ λ_C, magnetism at L_c^* ~ lstring(Φcrit/|∇Φ_G|)^β, weak force at L_c^* ~ m_W⁻¹, strong force at L_c^* ~ ΛQCD⁻¹, and repulsion at L_c^* ~ LHubble. The true unification is ontological— all interactions are projections of a single substrate Ψ_I⁽⁰⁾—rather than phenomenological. This rewrites the unification condition from single-scale quantum Lagrangian'' to multi-scale coarse-graining emergence of one ontological field.'' Keywords: unification condition, quantization boundary, multi-scale emergence, characteristic coarse-graining scale, Planck scale, Compton scale, Hubble scale, ontological unification, theory of everything critique