[ObjectIsAdvantag]

Summary

• Upgrade actions/checkout and actions/setup-node to v7 across validation and publish workflows.
• Run the full check suite on Node.js 22 and 24, with a stable validate aggregate check that fails unless the full matrix succeeds.
• Keep validator-node-20 as the explicit Node.js 20 compatibility check for the validator.

Validation

• npx prettier --check passed for all changed files.
• npm run check passed locally on Node.js 24.18.0 / npm 11.16.0.
• actionlint is not installed locally; GitHub Actions will validate the workflow definitions and run the Node matrix.

AI assistance

• GitHub Copilot assisted with workflow design, implementation, and PR preparation. The human maintainer remains responsible for review and approval.