Publishing to the AUR needs a maintainer AUR account and its SSH key registered as a secret here, neither of which exists yet. Rather than leave the workflow permanently failing at that last step, it now stops short of AUR and instead uploads the built .pkg.tar.zst to the same GitHub release it built from, as a plain downloadable asset (`pacman -U` to install). The AUR-push step is still in this file's git history if that setup happens later. Renamed publish-aur-package.yml -> publish-arch-package.yml to match. The render/validate steps are unchanged; new here is capturing the exact built package filename from inside the build container (makepkg is the only thing that actually knows it) and an upload step that follows the same create-or-reuse-release, strip-upload_url, POST-octet-stream pattern build-app.yml and backfill-releases.yml already use for GitHub assets, plus a delete-existing-asset-first step so a re-dispatch for an already-packaged version replaces rather than 422s. Verified with a real Docker run end to end: rendered a real PKGBUILD, built a real (synthetic) .deb through makepkg + namcap in an archlinux container, confirmed the container exits 0, and confirmed the exact package filename it captures (triple-c-bin-<version>-1-x86_64.pkg.tar.zst) round-trips out via docker cp intact.