triv: fake inline improvement

Author: oko-x

src/django_smartbase_admin/engine/fake_inline.py

@@ -114,7 +114,7 @@ def get_fake_inline_identifier_annotate(self):
         # result of this method is used in fake_inline_queryset.annotate(SBAdminFakeInlineMixin.fk_name='result')
         # example usage:
         # return F('some_model__relationship_to_parent')
-        return F("id")
+        return F("pk")
 
     def get_queryset(self, request):
         model = self.original_model