onGitHubReleasePublished emits release deliveries whose action is "published".
automations/watch-published-github-releases.automation.ts
account defaults to the project binding. Returns Signal<GitHubReleasePublishedEvent> with action: "published" and the complete typed release payload, including tag, target, draft and prerelease flags, author, assets, timestamps, and URLs. The installation needs Contents read permission and repository access.