[Bug]: Private channel for reporting a security issue

### Is there an existing issue for this?

- [x] I have searched the existing issues.

### Current Behavior

Hello maintainers,

I found a potential security issue affecting a GitHub Actions workflow in this repository.

I do not want to disclose technical details publicly before maintainers have reviewed them. Could you please enable GitHub private vulnerability reporting or provide an alternative private security contact email?

I can provide a detailed report including the affected workflow path, current commit, impact assessment, non-destructive validation steps, and suggested remediation.

### Expected Behavior

N/A

### To Reproduce

N/A

### Anything else?

_No response_

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct