By: lcnbr <im@lcnbr.ch>
Repair main CI prerequisites, macOS paths and Nix producer caching Install compatible Just, Typst and prebuilt Jujutsu in the actual test jobs. Normalize watcher paths and avoid case-insensitive README fixture collisions. Backport the verified complex-format precision fix without changing numeric reference checks. Authenticate NixCI cache reuse and retain producer roots through publication under bounded build concurrency and store collection. Co-authored-by: Kaapo Seppänen <seppanenkaapo@gmail.com>