only log private stuff to debug

closes #6069

lib/postzord/receiver/private.rb

@@ -44,8 +44,9 @@ class Postzord::Receiver::Private < Postzord::Receiver
   def receive_object
     obj = @object.receive(@user, @author)
     Notification.notify(@user, obj, @author) if obj.respond_to?(:notification_type)
-    logger.info "user:#{@user.id} successfully received #{@object.class} from person #{@sender.guid}: " \
-                "#{@object.inspect}"
+    logger.info "user:#{@user.id} successfully received #{@object.class} from person #{@sender.guid}" \
+                "#{": #{@object.guid}" if @object.respond_to?(:guid)}"
+    logger.debug "received: #{@object.inspect}"
     obj
   end