It seems you provided a placeholder (“undefined”) instead of specific details about the Pull Request (PR) in the Thanos project. To create a meaningful summary, I would need at least the following information:

1. Title of the Pull Request: What is the main purpose of the PR?
2. Description/Contributions: What changes or features are being introduced?
3. Related Issues: Are there any linked issues or discussions that provide context?
4. Changes Made: What specific code or documentation changes have been implemented?
5. Impact: How do these changes affect the project, and what areas are likely to be impacted?
6. Review Notes: Any additional notes that reviewers should consider?

If you can provide this information, I’d be glad to help you create a detailed summary!