Upgrade Buzz to desktop-v0.5.7

[marcusquinn]

Goal

Upgrade the Cloudron package from Buzz desktop-v0.5.4 to the latest stable desktop-v0.5.7, publish the resulting catalog release, and update the configured Cloudron app.

Evidence

• Upstream release desktop-v0.5.7 was published at 2026-08-07T23:09:06Z.
• The release resolves to commit f167818d25dd9f03115ab907a16f07daee2ece5c.
• Package 0.1.10 currently embeds upstream 0.5.4.
• The matching immutable GHCR relay image is still pending and must be verified before source changes are finalized.

Files

• Dockerfile
• CloudronManifest.json
• CHANGELOG and CHANGELOG.md
• README.md, SECURITY.md, and THIRD_PARTY_NOTICES.md
• test/package-test.sh and test/verify-buzz-image.sh
• Generated CloudronVersions.json during publication

Reference pattern

Model the change on PR #54: pin the upstream release commit, multi-platform image-index digest, and linux/amd64 manifest digest; update every provenance assertion together; build and test before publication.

Acceptance criteria

• Package version advances to 0.1.11 and upstream version to 0.5.7.
• Buzz release, commit, image index, and linux/amd64 manifest references are immutable and mutually consistent.
• Static package/security tests, image verification, and linux/amd64 Docker build pass.
• The managed package release and catalog publication complete successfully.
• The configured Cloudron app updates to 0.1.11 and reports healthy.

Verification

./test/package-test.sh
./test/verify-buzz-image.sh
docker build --platform linux/amd64 --tag cloudron-buzz-app:test .
cloudron status --app buzz
cloudron exec --app buzz -- /app/code/buzz-ctl status

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