GitHub Actions release.yml + docker job currently doesn't fire (org
shadow-ban). ship.sh replicates the CI pipeline locally so releases
keep landing on Hetzner + Docker Hub without depending on CI:
1. Sanity checks: clean tree, tag at HEAD, version.go match
2. goreleaser release --skip=publish (build dist/*)
3. publish-cli-release.sh (rsync to Hetzner + flip version.txt)
4. docker buildx --push multi-arch (amd64 + arm64)
5. Smoke: torrentclaw.com/version + docker run image version
6. Optional --push to git-push tag to GH
Exposed via make targets: ship, ship-dry, ship-push.
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