Add workflow to create releases on tag push

[mattn]

Pushing a v* tag now creates the GitHub release automatically with generated notes (What's Changed / New Contributors / Full Changelog, same format as the v1.14.48 notes). Skips tags that already have a release.

Summary by CodeRabbit

• New Features
  • Added an automated release workflow that creates a release when version tags (e.g., v*) are pushed.
  • Avoids creating duplicate releases by checking whether a release already exists for the tag.
  • Automatically generates release notes and verifies the tag before publishing.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 10571d38-6124-4379-a884-aab439fb2364

📥 Commits

Reviewing files that changed from the base of the PR and between 485f31f and a93a209.

📒 Files selected for processing (1)

• .github/workflows/release.yaml

🚧 Files skipped from review as they are similar to previous changes (1)

• .github/workflows/release.yaml

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📝 Walkthrough

Walkthrough

Adds a GitHub Actions workflow that runs for v* tag pushes, checks for an existing release, and creates a verified GitHub release with generated notes when none exists.

Changes

Release automation

Layer / File(s)	Summary
Tagged release workflow .github/workflows/release.yaml	The workflow triggers on version tags, grants contents: write, serializes runs per tag reference, skips existing releases, and creates missing releases with tag-derived metadata and generated notes.

Estimated code review effort: 2 (Simple) | ~10 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: a new workflow that creates releases when tags are pushed.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch add-release-workflow

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[coderabbitai]

Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.github/workflows/release.yaml:
- Around line 20-23: Update the release lookup condition around gh release view
so only an explicit “release not found” response proceeds to creation; treat
authentication, network, API, and other unexpected lookup failures as errors and
exit before the non-idempotent release creation step. Preserve the existing skip
behavior when the release already exists.
- Around line 20-24: Add a workflow-level concurrency configuration in
release.yaml using a group keyed by the release tag (GITHUB_REF_NAME), with
cancel-in-progress disabled, so runs for the same tag serialize before the
existing gh release view and gh release create steps.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 43bf2f61-cf19-418f-8b27-ecfd5fb54b1f

📥 Commits

Reviewing files that changed from the base of the PR and between 9415230 and 485f31f.

📒 Files selected for processing (1)

• .github/workflows/release.yaml