The Canonical Local Singular Series on Primorial Lattices: Strict Decrease, Crossing Structure, and the Plateau Conjecture

Erratum release v1.0.1 (2026-09-13). This fixes the closed-form expression for U(k) in Theorem 11: the true root of the quadratic W r^2 + k r - k^2 = 0 is U(k) = k(sqrt(1+4W)-1)/(2W). The previous v1.0.0 text gave a formula that is instead the root of W r^2 + (k-W) r - k^2 = 0 and does not annihilate the stated quadratic (a purely algebraic transcription error; all theorem conclusions are unaffected, since the displayed value is a valid upper bound). Full manuscript, reproduction toolchain (45 scripts), frozen claims registers and stage ledgers S0-S7 are included.