Add announce federation.

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -199,6 +199,10 @@ def announce(%User{ap_id: ap_id} = user, %Object{data: %{"id" => id}} = object)
 
     update_object_in_activities(object)
 
+    if user.local do
+      Pleroma.Web.Federator.enqueue(:publish, activity)
+    end
+
     {:ok, activity, object}
   end