Release: four closure items, nothing new constructed

: four closure items, nothing new constructed{ C1 (scope): closed by Proposition prop:scope. C2 (one-contraction boundary): closed by Theorem thm:nonextension; the check is an identity for one pair and does not extend by the sheet's tools. C3 (normalization sheet): closed by Theorem thm:unique and Corollary cor:contact; the classical normalization on ${\mathcal{L}}_{\mathrm{off}}$ determines $R_1$, and sheet-compatible contact modifications vanish in ${\mathfrak{A}}_0$. C4 (Branch B): recorded as an input list (Section sec:branchB); not opened.

No time-ordered family, graviton action, graviton propagator, contraction domain for a quantum metric, second-order quantum map, loop, state, or sharp limit is defined. X-B's release theorem is neither enlarged nor withdrawn.}