Azure synapse batch job results to be returned from livy via API (without intermediate storage)

Question

Is there a recommended way to return a small amount of output from a batch job that is executed via livy?

In the best case I would return all of stdout from the driver.

Otherwise it might be enough to return a short string that says something useful/informative like "SUCCESSFULLY PROCESSED 1234 RECORDS".

Below is an image showing Livy batch response from the API. I'm wondering if I can use "log" or "appInfo" or "tags" to send a custom response, so that it can be consumed by the client that submitted the batch job. Any help would be appreciated.