* Bump GitHub Actions across workflows
Update workflow dependencies to newer major versions in repository automation files. This upgrades `actions/checkout` to v7, `actions/github-script` to v9, `actions/create-github-app-token` to v3, and GitHub Pages actions (`upload-pages-artifact` and `deploy-pages`) to v5 to keep CI/CD and maintenance workflows current.
* add dependabot for gh actions
Compute today's date once and use a consolidated patchBody for PATCH requests (including last_update_commit from PR_URL/COMMIT_URL). Add logic to promote dev scripts on merge: if record.is_dev === true, set is_dev to false and script_created to today, and log the promotion. Replace the previous duplicated date construction with the new patchBody.