Instantly upgrade account to ActivityPub if we receive ActivityPub payload (#4766)

app/controllers/activitypub/inboxes_controller.rb

@@ -26,8 +26,12 @@ class ActivityPub::InboxesController < Api::BaseController
   end
 
   def upgrade_account
-    return unless signed_request_account.subscribed?
-    Pubsubhubbub::UnsubscribeWorker.perform_async(signed_request_account.id)
+    if signed_request_account.ostatus?
+      signed_request_account.update(last_webfingered_at: nil)
+      ResolveRemoteAccountWorker.perform_async(signed_request_account.acct)
+    end
+
+    Pubsubhubbub::UnsubscribeWorker.perform_async(signed_request_account.id) if signed_request_account.subscribed?
   end
 
   def process_payload

app/workers/resolve_remote_account_worker.rb

+# frozen_string_literal: true
+
+class ResolveRemoteAccountWorker
+  include Sidekiq::Worker
+
+  sidekiq_options queue: 'pull', unique: :until_executed
+
+  def perform(uri)
+    ResolveRemoteAccountService.new.call(uri)
+  end
+end