The Euler-Mascheroni Constant from Icosahedral Geometry: v3.4 Retirement Notice

V3.4 changes from v3.3:Mr Adversary cycle-4 review fixes incorporated — the "0.013%" figure used for γ ≈ 1/√3 disambiguated wherever it appears (the absolute reading is correct as published; the relative reading is ≈0.023%; both noted parenthetically to prevent misreading by a calculator-equipped sceptic), §4 candidate (a) sharpened by one sentence naming why face-internal 1/√3 is generic to triangular-faced polyhedra (tetrahedron, octahedron) so that what makes it 2I-specific must be the global geometry rather than the face, §4 candidate (b) folded to a single line acknowledging that other projection candidates exist but are too under-specified to commit to here, §2.1 closure-claim citation gap closed by…