Fix DM reminders trying to load guild data

src/postman/mod.rs

@@ -52,6 +52,7 @@ async fn _initialize(ctx: Context, pool: impl Executor<'_, Database = Database>
 
             for reminder in reminders {
                 reminder.send(pool, ctx.clone()).await;
+                let _ = sd_notify::notify(false, &[NotifyState::Watchdog]);
             }
         }