It appears that you’ve referenced an “undefined Pull Request” for the Thanos project, but without specific details or context about the PR, I can’t provide a summary. To assist you effectively, I would need information such as:

• The title or description of the Pull Request.
• Key changes or features introduced in the PR.
• Any relevant discussions or comments from reviewers or maintainers.
• Related issues or tickets that the PR addresses.

If you can provide additional context or details about the Pull Request, I would be happy to help you create a summary tailored for an advanced developer!