refactor: Models feature parity (#28456)

apps/meteor/app/api/server/middlewares/authentication.ts

apps/meteor/app/api/server/v1/im.ts

apps/meteor/app/api/server/v1/users.ts

apps/meteor/app/cas/server/cas_server.js

apps/meteor/app/file-upload/server/lib/FileUpload.js

...r/app/irc/server/irc-bridge/peerHandlers/joinedChannel.js

...eteor/app/lib/server/methods/checkUsernameAvailability.ts

apps/meteor/app/livechat/server/api/lib/departments.ts

apps/meteor/app/livechat/server/api/lib/rooms.ts

apps/meteor/app/livechat/server/business-hour/Helper.ts

...pp/livechat/server/business-hour/LivechatBusinessHours.ts

apps/meteor/app/meteor-accounts-saml/server/lib/SAML.ts

apps/meteor/app/models/server/models/LivechatDepartment.js

apps/meteor/app/models/server/models/Users.js

apps/meteor/ee/server/lib/ldap/Manager.ts

...es/federation/infrastructure/rocket-chat/adapters/Room.ts

apps/meteor/ee/server/models/raw/LivechatRooms.ts

apps/meteor/package.json

apps/meteor/server/lib/sendDirectMessageToUsers.ts

apps/meteor/server/lib/sendMessagesToAdmins.ts