Query Optimization for large servers

[Djones4822]

I tried deploying on a server with 100k+ members that needed to be purged. The first role we selected fetched 40k members, the guildSync and roleSync both encountered failures due to the query using a parameterized member list comparison.

I have a fork that builds and runs, however I don't think I'm going to tackle refactoring the queries unless you're willing to merge the changes/offer support.

Let me know, I can contribute if you are interested in picking this back up. Migrating to Discord4j 3.2x would be wise too, I encountered a number of problems with that (i have a branch in my fork).