Fix child deletion in ModelTree trait

Replaces the shorthand each->delete() with an explicit closure to ensure each child model is properly deleted. This improves compatibility and clarity in the child deletion process.

Author: cklei-carly

src/Concern/ModelTree.php

@@ -46,8 +46,9 @@ public static function bootModelTree()
             static::buildSortQuery()
                 ->where($model->determineParentColumnName(), $model->getKey())
                 ->get()
-                ->each
-                ->delete();
+                ->each(function ($child) {
+                    $child->delete();
+                });
         });
     }