refactor: make Bus dispatch synchronous

Remove async coroutine wrapper from event dispatch to simplify execution model and improve trace hierarchy. Listeners now execute synchronously in the caller's context, with dependency resolution inlined.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/Utopia/Bus/Bus.php

@@ -35,26 +35,17 @@ class Bus
         $resolver = $this->resolver;
         $listeners = $this->listeners[$event::class] ?? [];
 
-        /** @var array<array{Listener, array<mixed>}> $resolved */
-        $resolved = [];
         foreach ($listeners as $listener) {
             $deps = array_map($resolver, $listener->getInjections());
-            $resolved[] = [$listener, $deps];
-        }
-
-        go(function () use ($resolved, $event) {
-            foreach ($resolved as [$listener, $deps]) {
-                $action = 'listener.' . $listener::getName();
-                Span::init($action);
-                Span::add('bus.event', $event::class);
-                try {
-                    ($listener->getCallback())($event, ...$deps);
-                } catch (\Throwable $e) {
-                    Span::error($e);
-                } finally {
-                    Span::current()?->finish();
-                }
+            Span::init('listener.' . $listener::getName());
+            Span::add('bus.event', $event::class);
+            try {
+                ($listener->getCallback())($event, ...$deps);
+            } catch (\Throwable $e) {
+                Span::error($e);
+            } finally {
+                Span::current()?->finish();
             }
-        });
+        }
     }
 }