It seems that the Pull Request (PR) you referred to is currently undefined, and as such, I do not have specific details to create a summary. To provide a relevant and targeted summary, I would need information on the changes proposed in the PR, the purpose of those changes, any associated issues, and any relevant context or background on the Thanos project at the time of the pull request.

If you can provide more details about the PR, such as its title, description, key changes, and any discussions or comments, I would be happy to help you create a comprehensive summary for an advanced developer.