Guild discovery: option to hide already joined guilds

Env var to disable db migrations, nix: drop pre-start service

Update schemas for profile customisation

Actually save webhook apps - fixes #1474

Well, dont then ig

try catch a migration line

cdn: avatar decorations

Add member profile customisation fields to db

Add user profile costomisation fields to db

fix: treat `guild_id=0` as no `guild_id` for discord mobile client (a.k.a. the mobile fuckery)

Assert req.params type as solely string (express update)

temp unfinished json stuff in ts

Use describe for test grouping, more functions, less const arrows

fix: find the user instead of creating it when replying to a message

Enforce numeric-only discriminators in PATCH /users/@me

LazyRequest: minor cleanup

Identify: hold onto access token

Basic offload configuration

fix: don't return default role for user profiles

Thread membership routes

READY changes for threads ported from #876

Channel/thread util methods ported from #876

Gateway event types ported from #876

Thread members ported from #876

Update message type enum

Regenerate migrations for threads

Merge remote-tracking branch 'origin/dev/threads'

Add basic thread helper functions

Update channel type enum to un-erkinalp-ize it, and match discord

thread stuff ig