switch all error logs to using *_err macros

src/api/client_server/sync/msc3575.rs

@@ -605,7 +605,7 @@ pub(crate) async fn sync_events_v4_route(
         }
         match tokio::time::timeout(duration, watcher).await {
             Ok(x) => x.expect("watcher should succeed"),
-            Err(error) => t::debug!(%error, "Timed out"),
+            Err(error) => debug_err!(error, "Timed out"),
         };
     }