[KEP-31]: Adding ControllerRevision support to the RoleBasedGroup

[bcfre]

Ⅰ. Motivation

KEP: adding ControllerRevision support to the RoleBasedGroup (RBG) object to store its historical states.

Ⅱ. Modifications

kep proposal

Ⅲ. Does this pull request fix one issue?

fixes #21

Ⅳ. List the added test cases (unit test/integration test) if any, please explain if no tests are needed.

Ⅴ. Describe how to verify it

VI. Special notes for reviews

Checklist

• Format your code make fmt.
• Add unit tests or integration tests.
• Update the documentation related to the change.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[cheyang]

/lgtm
/approve

[Copilot]

Pull Request Overview

This PR introduces a KEP (Kubernetes Enhancement Proposal) for adding ControllerRevision support to the RoleBasedGroup (RBG) object, enabling historical state tracking and version awareness for RBG configurations.

Key Changes:

• Proposes using Kubernetes ControllerRevision resources to store historical RBG states
• Introduces per-role revision tracking to prevent unintended cross-role updates
• Maintains backward compatibility with existing semantic equality-based update mechanisms

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
keps/31-rbg-controller-revision/kep.yaml	Metadata file defining the KEP proposal including authorship, status, and milestone information
keps/31-rbg-controller-revision/README.md	Detailed KEP documentation explaining motivation, design, API changes, and implementation approach for ControllerRevision support

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[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

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