* feat(assist): removed cache for solo-node assist mode
* feat(assist): try to fetch from global io object
* feat(assist): small changes
* feat(assist): added cache per request instead of cache per room
* feat(assist): fixed await call in global scope
* feat(assist): try to fix circular structure issue
* feat(assist): use preprocessor for sockets list
* feat(assist): check the theory about fetchSockets data set
* feat(assist): try to keep everything inside handshake.query object
* feat(assist): splitted socket methods in ee/websockets
* feat(assist): splitted socket methods in ee/websockets-cluster
* feat(assist): moved socket handlers to separate file
* feat(assist): changed the way how to get ws server
* feat(assist): use method to get io server instead of global object
* feat(assist): removed duplicated code from ee assists
* feat(assist): removed copy-paste http handlers
* feat(assist): added getServer call for some http handlers
* feat(assist): added creds=true to cors settings
* feat(backend): added debug log flag to assist stats
