Fix missing avatars by upserting users

[nicholaschiang]

We have a bunch of outdated profile_image_urls stored in Postgres that aren't being upserted every time we sync with Twitter:

To fix all those 404s, I should upsert the user rows that are returned (in the includes field) whenever we sync tweets (related to #397).

[nicholaschiang]

Another quick fix (kinda) is to restore our custom image optimization route as that will cache the optimized images locally and then serve those whenever possible (regardless of whether or not the image no longer exists on Twitter's servers).

[nicholaschiang]

Similarly, I should update tweets and every other object type that we receive every time we executeCreateQueue so that our tweet like and reply counts also always stay relatively up-to-date and in sync with Twitter.

[nicholaschiang]

I'm going to have to use pg-promise instead of Prisma for this as Prisma lacks upsertMany functionality (see https://github.com/prisma/prisma/issues/5066, https://github.com/prisma/prisma/issues/4134, https://github.com/prisma/prisma/issues/10362, etc) while pg-promise has lots of good helpers for constructing bulk queries.