Improve logging when receiving status code 500 due to an exception
When an exception occurs on the model-gateway side, the message and status code 500 appear in our GCP console and not in the Elastic dashboard - https://log.gprd.gitlab.net/app/r/s/j0vST.
Recent example - #195 (closed)
cc @lmcandrew
Edited by Alexander Chueshev