[Gekidou] Manage user websocket events (#5862)

* Manage user websocket events

* Revert ChannelMembership -> MyChannelMembership

* Address feedback

* Update channel display name when the user changes

* Minor name and refactoring changes from feedback

* Address feedback

* Address feedback

* Add line breaks for readability

types/database/database.d.ts

@@ -223,7 +223,7 @@ export type HandleGroupArgs = PrepareOnly & {
 };
 
 export type HandleChannelMembershipArgs = PrepareOnly & {
-  channelMemberships: ChannelMember[];
+  channelMemberships: Array<Pick<ChannelMembership, 'user_id' | 'channel_id'>>;
 };
 
 export type HandleGroupMembershipArgs = PrepareOnly & {

types/database/raw_values.d.ts

@@ -122,3 +122,4 @@ type RawValue =
   | TeamSearchHistory
   | TermsOfService
   | UserProfile
+  | Pick<ChannelMembership, 'channel_id' | 'user_id'>