Call result

Chat Bridge notifies the final status of each launched call through an HTTP POST request (webhook). To enable notifications you must provide the Voices team with the destination URL, which is configured in your App-Key. Optionally, you can define HTTP headers with constant values (for example, an authorization token) that will be sent with each webhook. If the call performs a transfer, separate events are emitted for the initial call and for the transfer (`call_type = transfer`). Your endpoint must accept `application/json` and respond with a 2xx HTTP code.