It seems that there is no detailed information about the undefined Pull Request you mentioned for the Thanos project. To provide a comprehensive summary for an advanced developer, I would need specific details regarding the changes made, including files modified, the purpose of the PR, any relevant issues it addresses, and any specific technical considerations or impacts on the project architecture.
If you have that information, please share it, and I can help you create a detailed summary. Alternatively, if you need guidance on how to summarize Pull Requests effectively, I could provide that as well.