It appears that the Pull Request you are referring to is undefined or missing specific details. To provide a summary for an advanced developer regarding a Pull Request in the Thanos repository, please provide the following information:

1. The main goal or purpose of the Pull Request.
2. Key changes or features introduced.
3. Any specific files modified or new files added.
4. Relevant context or background information affecting this PR.
5. Any associated issues or discussions.
6. Testing conducted, if applicable.

Once you provide this information, I can help you create an effective summary for the Pull Request in question.