When using External Tasks and calling "fetchAndLock" a mandatory parameter in the REST API is "lockDuration". After this time Camunda will unlock the External Task (so the task won't fail silently and it will be available again for execution).
Is there a way to either:
* mark this task as failed after the timeout instead of automatically unlocking it (this is a not requested retry)
* execute an alternative flow after the timeout (this could i.e. send a notification about the timeout)