Enable/Enforce - Authn for the API reqs  in stage.

This can be done by setting the env value in stage as "true"

refer: https://github.com/project-kessel/relations-api/blob/main/configs/config.yaml#L11 for config and how to oeverwrite in app-interface for stage deployment

Note: this can be enabled Only after coordinating with assets/RBAC team and notifications team

Definition of Done:

• Auth is enabled in stage
• Verify the requests/smoke tests