It appears that the details of the Pull Request (PR) you are referring to are not provided. To create a summary for an advanced developer regarding a PR for the thanos-io/thanos project, I would typically look for the following information:

  1. Title and Description: What does the PR aim to achieve? Key features, fixes, or enhancements.
  2. Motivation: Explanation of the problem being addressed or the motivation behind the changes.
  3. Changes: A detailed list of what has been modified, added, or removed in the codebase.
  4. Impact: Any implications for existing functionality, performance, or compatibility.
  5. Testing: Information on any tests that have been added or updated, and the overall testing strategy.
  6. Review Requests: Any specific requests for feedback or areas where the author seeks input from reviewers.
  7. Related Issues: Links to any associated issues or discussions that provide additional context.

If you can provide more specific details or describe the content of the PR, I’d be happy to help you craft a more tailored summary!