Call result

Chat Bridge notifies the final status of each originated 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. A `SENT` event is emitted when the call completes and includes the conversation duration, transcription, analysis results and collected data; a `FAILED` event is emitted when the call could not be initiated and includes the SIP termination code. Your endpoint must accept `application/json` and respond with a 2xx HTTP code; failed deliveries are retried automatically.