message: Add a span for startup
diff: @@ -431,6 +431,7 @@ where
  /// Creates a new runner from a given configuration, using existing metrics.
  #[inline]
  + #[instrument("runner creation", level = "debug", skip(cfg, rng, registry))]
  pub async fn with_metrics(
  cfg: R::Config,
  rng: &mut NodeRng,
  