chore: fixed consensus error logging (#2219)

"%err" is just printing the leaf message which is not useful. "{err:#}"
prints the whole stack trace, as desired.

core/node/consensus/src/era.rs

@@ -23,7 +23,7 @@ pub async fn run_main_node(
     // For now in case of error we just log it and allow the server
     // to continue running.
     if let Err(err) = super::run_main_node(ctx, cfg, secrets, ConnectionPool(pool)).await {
-        tracing::error!(%err, "Consensus actor failed");
+        tracing::error!("Consensus actor failed: {err:#}");
     } else {
         tracing::info!("Consensus actor stopped");
     }