It seems that the Pull Request you’re referring to is undefined, meaning there are no specific details or context provided regarding its content, changes, or purpose. To create a summary suitable for an advanced developer for a Pull Request in the thanos-io/thanos project, I would need more specific information.

Typically, a Pull Request summary might include:

• Title: A brief description of what the PR aims to achieve.
• Context: Why the changes are necessary and any related issues or discussions.
• Changes Made: A detailed list of modifications, including new features, bug fixes, or refactoring.
• Testing: Information about how the changes were tested and any new tests added.
• Impact: Potential implications of the changes on the existing codebase or functionality.
• Next Steps: Any further actions required post-merge.

If you provide specific details about the Pull Request, I can create a more tailored summary!