It appears that the details of the Pull Request (PR) for the Thanos project are unspecified or missing. In order to provide a meaningful summary, I would need information such as:

1. The purpose of the PR.
2. Key changes or features introduced.
3. Any relevant issues or discussions it addresses.
4. Code modifications made, including components affected.
5. Tests or documentation updates included.

If you have access to any specific details or context regarding the PR, please share them, and I can help create a suitable summary for an advanced developer.