@type t() ::
:poll_closed
| :message_deleted
| :poll_updated
| :notification_invited
| :reminder_created
| :notification_added_to_channel
| :connection_recovered
| :poll_deleted
| :user_watching_start
| :member_removed
| :health_check
| :poll_vote_changed
| :notification_mark_unread
| :notification_removed_from_channel
| :notification_message_new
| :reaction_updated
| :channel_hidden
| :draft_deleted
| :notification_invite_accepted
| :notification_channel_truncated
| :member_updated
| :ai_indicator_clear
| :channel_visible
| :message_new
| :notification_mark_read
| :member_added
| :typing_start
| :user_unbanned
| :message_updated
| :any
| :user_banned
| :channel_updated
| :poll_vote_removed
| :channel_truncated
| :thread_updated
| :channel_deleted
| :notification_mutes_updated
| :poll_answer_removed
| :user_updated
| :message_read
| :poll_answer_casted
| :connection_changed
| :notification_reminder_due
| :draft_updated
| :notification_channel_deleted
| :poll_vote_casted
| :ai_indicator_update
| :user_watching_stop
| :typing_stop
| :reminder_deleted
| :ai_indicator_stop
| :reaction_new
| :reaction_deleted
| :reminder_updated
| :notification_thread_message_new