f482d0d2fa
Last push failed both android and flutter jobs at workflow-setup time because the runner couldn't resolve forgejo/upload-artifact@v3 (github.com/forgejo/upload-artifact does not exist; the Forgejo project hosts on Codeberg and our Gitea runner falls through to github by default). The canonical Gitea Actions form is actions/upload-artifact@v4, which act_runner resolves cleanly. Flutter pipeline is being retired in favor of the native Android client, so flutter.yml is deleted outright rather than fixed. The container-image build's release-asset polling (release.yml) will now graceful-degrade when chasing the legacy minstrel-<TAG>.apk name, which the comment in ci-requirements.md already documents as acceptable. Renaming the native APK to drop the -android- infix is deferred to a follow-up so the cutover is reviewable in isolation.