Handle the redirect from 3DS authentication flow. This endpoint processes the authentication result and completes the transaction after the customer has completed 3DS authentication with their card issuer.

About 3DS Redirect

This endpoint is called when:

• Customer completes 3DS authentication with their bank
• Card issuer redirects back to merchant's specified URL
• Transaction needs to be finalized after successful authentication

The endpoint processes the authentication result and returns the transaction status accordingly.