It seems that you have provided an undefined Pull Request (PR) for the Thanos project, which makes it difficult to generate a summary without specific details about the changes being proposed.

To create an effective summary, please provide some context or key points about the PR, such as:

  1. Purpose: What is the goal of the PR? (e.g., bug fix, new feature, documentation update)
  2. Changes: What files or parts of the codebase are affected? Any notable structural changes?
  3. Impact: How do these changes affect the functionality, performance, or usability of the Thanos project?
  4. Review Notes: Any important notes or considerations for reviewers?

Once you provide this information, I will be able to create a comprehensive summary for you.