Fix Docker publish ordering: run after build-linux

[fernandotonon]

Summary

• Moves the Docker publish job into deploy.yml with needs: build-linux so it runs after the .deb is built
• The job downloads the linux-binaries artifact directly instead of trying to fetch from the release (which wasn't uploaded yet)
• Converts docker-publish.yml to workflow_dispatch only, for manual rebuilds from existing releases

Why

The separate docker-publish.yml triggered on release: published but ran concurrently with the build jobs, so the .deb didn't exist yet — causing the download to fail.

Test plan

• Create a release and verify docker-publish job runs after build-linux completes
• Verify the Docker image is pushed to ghcr.io
• Test manual dispatch of Docker Publish (Manual) workflow

🤖 Generated with Claude Code

Summary by CodeRabbit

Release Notes

• Chores
  • Added automated Docker image publishing to Docker Hub and GHCR following release events.
  • Updated release workflow to support manual image build triggering with version specification.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: a67ba534-96b0-4f7f-8455-6187a80aa09f

📥 Commits

Reviewing files that changed from the base of the PR and between 5a7b34a and f2501c8.

📒 Files selected for processing (2)

• .github/workflows/deploy.yml
• .github/workflows/docker-publish.yml

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📝 Walkthrough

Walkthrough

Two GitHub workflow files are modified to enhance Docker image publishing: a new job is added to deploy.yml for post-release Docker image publication, while docker-publish.yml is refactored to use manual dispatch instead of release triggers and simplifies tag computation logic.

Changes

Cohort / File(s)	Summary
New Docker Publish Job .github/workflows/deploy.yml	Introduces a post-release Docker image publication pipeline including artifact download, version extraction from .deb file, multi-registry push (GHCR and Docker Hub), image verification, and dynamic tag generation.
Docker Publish Workflow Updates .github/workflows/docker-publish.yml	Changes trigger from release-based to manual dispatch; simplifies tag determination logic by removing release event handling; updates tag computation to conditionally append "latest" tag; conditions .deb download based on resolved tag; removes Docker Hub login gating and adds GITHUB_OUTPUT propagation for tag values.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Possibly related PRs

• fernandotonon/QtMeshEditor#184: Modifies docker-publish workflow to build and publish Docker images from release .deb with version extraction, buildx usage, and multi-registry pushing.

Poem

🐰 A workflow takes flight, from release to registry bright,
Docker images now dance, through GHCR's expanse,
Hub and verification aligned, automation refined! 🐳✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/docker-publish-ordering

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