Agentic Autofix for Security Alerts in PRs [public preview]

### Value Prop

With agentic autofix, you can automatically resolve code scanning security alerts in pull requests with fixes that are verified for safety and effectiveness. This means you spend less time investigating and validating fixes, and can confidently commit changes knowing they won’t break your code or introduce new vulnerabilities.

### Expected Outcome

We want to make it easier and safer for developers to address security issues in their code by providing automated, validated fixes directly within pull requests. This should reduce the time and effort needed to remediate security findings, leading to more secure code and a smoother development workflow.