[Feature]: Handle faults on Guardrails/Policies

Please select the area the issue is related to

Gateway

Please select the aspect the issue is related to

Aspect/Other (Anything else which does not match above categories)

Suggested Feature

Our current Gateway does not handle policy/guardrail failures/errors. When a policy or guardrail fails, the Gateway currently just returns a 422 error. Customers need to do various stuff like publishing events to third party sources upon failures. This needs to be supported on the Gateway.

Related Issues

No response

Steps to Verify

• Design Document — A detailed design document has been created and reviewed, covering architecture, data flow, and edge cases.
• Design Mail — A design summary email has been sent to relevant stakeholders for awareness and feedback.
• Code Review — All code changes have been peer-reviewed and approved according to the project's review standards.
• Testing Complete — Adequate unit, integration, and/or end-to-end tests have been written and are passing.
• Documentation Review — User-facing and/or developer documentation has been updated to reflect the new feature and reviewed.
• Feature Complete — The feature is fully implemented, all checklist items above are done, and it is ready for release.