## Context
This config tells bullmq what to do with jobs once they have been
processed.
We used to retain 100 completed jobs and 500 failed jobs. We never
really needed that much retention and keeping succeeded job is not
useful either in our case. I'm updating the strategy so all completed
jobs are removed from the queue and we now keep 100 failed jobs in case
we need to debug. (Although we should have good monitoring with
ExceptionHandler driver)
Weiko
381c180ab9