Revert "Features: 1) Update category root logic to retrieve the first family member instead of the root node;"

This reverts commit 82f59307bf.

core/elasticsearch/documents.py

@@ -63,7 +63,7 @@ class ProductDocument(_BaseDoc):
         return float(obj.price) if obj.price else 0.0
 
     def prepare_top_level(self, obj):
-        root = obj.category.get_family().first() if obj.category else None
+        root = obj.category.get_root() if obj.category else None
         return root.slug if root else "other"
 
     def prepare_product_type(self, obj):