Fix order sorting by changing ordering field to UUID

Previously, orders with duplicate `human_readable_id` were sorted by `id`, which could lead to inconsistencies. Updated the code to sort by `uuid` to ensure a more reliable and unique ordering. This prevents potential issues when resolving duplicate entries.

core/migrations/0018_alter_order_human_readable_id.py

@@ -13,7 +13,7 @@ def fix_duplicates(apps, schema_editor):
     )
     for duplicate in duplicates:
         h_id = duplicate["human_readable_id"]
-        orders = Order.objects.filter(human_readable_id=h_id).order_by("id")
+        orders = Order.objects.filter(human_readable_id=h_id).order_by("uuid")
         for order in orders[1:]:
             new_id = order.human_readable_id
             while Order.objects.filter(human_readable_id=new_id).exists():