refactor: use child containers instead of clone for request scoping

Replace `clone $this->container` with `new Container($this->container)`
to use the parent-child delegation pattern introduced in utopia-php/di
0.3, consistent with how Base::prepare() already creates scoped containers.

https://claude.ai/code/session_0196tmVsX1KjJKmuHncp7HiV

Author: claude

src/Http/Http.php

@@ -395,7 +395,7 @@ public function start()
                 $response = new $this->responseClass($response);
             }
 
-            $container = clone $this->container;
+            $container = new Container($this->container);
 
             $container->set('request', fn () => $request)
                 ->set('response', fn () => $response);
@@ -411,7 +411,7 @@ public function start()
         });
 
         $this->server->onStart(function () {
-            $container = clone $this->container;
+            $container = new Container($this->container);
 
             $container->set('server', fn () => $this->server);