fix: recover workflow lint and template drift

[keito4]

Summary

• Add actionlint config to suppress only shellcheck info/style noise while preserving actionable workflow lint failures.
• Make CI run workflow lint when YAML or actionlint config changes.
• Recover drift between actual workflows, workflow templates, and label templates.
• Add regression coverage for actionlint config path filtering and PR size labels.

Verification

• actionlint
• npm run format:check
• npm run lint
• npm test
• npm run shellcheck
• npx bats test/integration/workflows.bats
• npx bats test/integration/
• bash script/update-agents-md.sh --check
• git diff --check

Notes

npm audit --audit-level=high currently succeeds, but still reports the existing moderate js-yaml advisory through the Jest dependency tree. This PR does not force the disruptive downgrade suggested by npm audit fix.

[claude]

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Exclude draft PR issue comments correctly

For issue_comment events on PR conversation comments, github.event.issue is the issue-shaped payload and does not include the PR's draft field, so github.event.issue.draft == true never becomes true. In repositories using this template, commenting @claude on a draft PR still starts the Claude job even though the new header says PR issue comments are excluded for drafts; the workflow needs to fetch the PR or otherwise use a payload that actually contains pull_request.draft before making this decision.

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[github-actions]

🎉 This PR is included in version 1.117.0 🎉

The release is available on GitHub release

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