It seems that no specific details were provided regarding the Pull Request for the project thanos-io/thanos. To create a comprehensive summary, I would need information such as:

• The title and description of the Pull Request.
• The main objectives or changes introduced.
• Any relevant code changes, such as new features or bug fixes.
• Impact on existing functionality and any potential breaking changes.
• Testing requirements or results.
• Review comments or discussions that highlight important points.

If you can provide these details, I’ll be able to help you create a meaningful summary.