message: Fix default store
diff: @@ -141,10 +141,7 @@ impl Default for Store {
  let config = get_config();
  let engine = get_engine(config);
  let tunables = BaseTunables::for_target(engine.target());
  - Store {
  - engine: Arc::new(engine),
  - tunables: Arc::new(tunables),
  - }
  + Self::new_with_tunables(&engine, tunables)
  }
  }
  