fixed cast related issues in PaginatedModelsLoader::loadRelatedModels…

… by using $relatedModel->getRawOriginal() instead of $relatedModel->getOriginal()

src/Execution/ModelsLoader/PaginatedModelsLoader.php

@@ -85,7 +85,7 @@ protected function loadRelatedModels(EloquentCollection $parents): EloquentColle
         return $relatedModels->unique(
             // Compare all attributes because there might not be a unique primary key
             // or there could be differing pivot attributes.
-            static fn (Model $relatedModel): string => json_encode($relatedModel->getOriginal()),
+            static fn (Model $relatedModel): string => json_encode($relatedModel->getRawOriginal()),
         );
     }