It seems that there is no specific information provided about the Pull Request for the “thanos-io/thanos” project, as it is marked as “undefined.” To create a summary, I would need details such as the goal of the Pull Request, any changes or features it introduces, related issues or discussions, testing implications, and any potential impacts on the project’s architecture or functionality.

If you can provide more context or specific information related to the Pull Request, I would be happy to help draft a summary for you!