Support pushing and receiving updates to poll tallies (#10209)

* Process incoming poll tallies update

* Send Update on poll vote

* Do not send Updates for a poll more often than once every 3 minutes

* Include voters in people to notify of results update

* Schedule closing poll worker on poll creation

* Add new notification type for ending polls

* Add front-end support for ended poll notifications

* Fix UpdatePollSerializer

* Fix Updates not being triggered by local votes

* Fix tests failure

* Fix web push notifications for closing polls

* Minor cleanup

* Notify voters of both remote and local polls when those close

* Fix delivery of poll updates to mentioned accounts and voters

app/lib/activitypub/activity/update.rb

@@ -5,6 +5,7 @@ class ActivityPub::Activity::Update < ActivityPub::Activity
 
   def perform
     update_account if equals_or_includes_any?(@object['type'], SUPPORTED_TYPES)
+    update_poll if equals_or_includes_any?(@object['type'], %w(Question))
   end
 
   private
@@ -14,4 +15,14 @@ class ActivityPub::Activity::Update < ActivityPub::Activity
 
     ActivityPub::ProcessAccountService.new.call(@account.username, @account.domain, @object, signed_with_known_key: true)
   end
+
+  def update_poll
+    return reject_payload! if invalid_origin?(@object['id'])
+    status = Status.find_by(uri: object_uri, account_id: @account.id)
+    return if status.nil? || status.poll_id.nil?
+    poll = Poll.find(status.poll_id)
+    return if poll.nil?
+
+    ActivityPub::ProcessPollService.new.call(poll, @object)
+  end
 end