Handle StaleObjectError when retrieving polls (#10208)

app/services/activitypub/fetch_remote_poll_service.rb

@@ -32,12 +32,17 @@ class ActivityPub::FetchRemotePollService < BaseService
     # votes, so we need to remove them
     poll.votes.delete_all if latest_options != poll.options
 
+    begin
       poll.update!(
         last_fetched_at: Time.now.utc,
         expires_at: expires_at,
         options: latest_options,
         cached_tallies: items.map { |item| item.dig('replies', 'totalItems') || 0 }
       )
+    rescue ActiveRecord::StaleObjectError
+      poll.reload
+      retry
+    end
   end
 
   private