Efimov ratio anchor: E_{n+1}/E_n(s_0=1) = exp(-2π)

Sympy-exact witness of the Efimov geometric-scaling canonical anchor at s_0 = 1. Setup: E_{n+1}/E_n = exp(-2π/s_0). Identity: at the s_0 = 1 canonical anchor (a clean dimensionless substitution; the physical s_0 ≈ 1.00624 is…