It seems that there is no specific information or content provided for the undefined Pull Request related to the Thanos project. To create a summary for an advanced developer, I would typically need details such as the nature of the changes being proposed, the motivation behind the Pull Request, any associated issues, the impact on the existing codebase, testing procedures, and any relevant discussions or comments from reviewers.

If you can provide more information or context about the Pull Request, I’d be happy to help craft a detailed summary.