Receives a Twelve Labs video understanding webhook callback.

Behavior: Processes webhook callbacks from the Twelve Labs API by deserializing the payload to extract the task ID and status, then sending a batch action message for asynchronous processing. The request is validated by the ValidateTwelveLabsWebhookRequestFilter.

Authorization: No authorization required. Validated by webhook filter.

Side Effects: A batch action message is sent to trigger asynchronous processing of the Twelve Labs task result.

Error Scenarios: Returns 200 OK even on errors to acknowledge receipt. Errors are logged but swallowed to prevent webhook retry storms.