Single-threaded subscription evaluation (#2682)

Author: joshua-spacetime

crates/core/src/subscription/module_subscription_actor.rs

@@ -696,7 +696,7 @@ impl ModuleSubscriptions {
 
         match &event.status {
             EventStatus::Committed(_) => {
-                update_metrics = subscriptions.eval_updates(&delta_read_tx, event.clone(), caller);
+                update_metrics = subscriptions.eval_updates_sequential(&delta_read_tx, event.clone(), caller);
             }
             EventStatus::Failed(_) => {
                 if let Some(client) = caller {