This should help with failing health checks while the crawler is running.
Quick math: 10 users, 30 songs each, each song requires at least 3
queries => 900 db queries every minute.
With the default of 10 pool connections, this blocks all available db
bandwidth for some time and causes slow UI and failing healthchecks.
When the spotify crawler loop would import an artist multiple
times in parallel the first would succeed but the following queries
would throw with following exception:
QueryFailedError: duplicate key value violates unique constraint "IDX_ARTIST_SPOTIFY_ID"
This error also could happen for the album or track.
