Fail gracefully

[Veldhoen]

Currently, the ASR task in Airflow fails every so often when the Whisper service gets evicted or OOMKilled. The triggerer will inquire about the status of a task ID that does not exist in the newly started Whisper service pod.
It would be nice if we can prevent this somehow, so that the same resources doesn't have to be processed for ASR again.
We should think about a good way to go about this. One proposal that we might discuss:

On receiving sigterm, stay alive until the task has finished AND Airflow trigger has been informed (that is: the API has sent a Status.DONE: status.HTTP_200_OK response upon a @api.get("/tasks/{task_id}") request.