It appears that you’ve provided an undefined Pull Request without specific details or context. To create a summary for an advanced developer for a Pull Request in the thanos-io/thanos project, I would typically need the following information:

1. Overview of the changes made in the Pull Request.
2. The purpose of these changes and any related issues or features.
3. Impact on the existing codebase (e.g., refactoring, performance improvements, bug fixes).
4. Any dependencies or integration details that are relevant.
5. Testing strategies or results included with the Pull Request.
6. Documentation updates, if any.

If you can provide more specific details about the Pull Request or its contents, I can then create a tailored summary for you.