Fix ParentEntityHandler attribute to call parent constructor

The Plugin base class requires the parent constructor to be called
with the id and deriver parameters. This fixes a TypeError in
HookCollectorPass during container compilation.

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

src/Attribute/ParentEntityHandler.php

@@ -61,6 +61,8 @@ class ParentEntityHandler extends Plugin {
     public readonly array $bundle_restrictions = [],
     public readonly int $weight = 0,
     public readonly ?string $deriver = NULL,
-  ) {}
+  ) {
+    parent::__construct($id, $deriver);
+  }
 
 }