feat(report): add events.jsonl SHA-256 to result_summary.json - #490

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: mlcommons/cla-bot@master. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/