Fix after refactoring

cg/services/order_validation_service/response_mapper.py

@@ -48,6 +48,9 @@ def map_sample_errors(order: dict, errors: list[SampleError]) -> None:
 def add_error(entity: dict, field: str, message: str) -> None:
     if not entity.get(field):
         set_field(entity=entity, field=field, value=None)
+    if field == "sample_errors":
+        # Special handling for sample errors since the 'value' corresponds to whether it is set
+        entity[field]["value"] = True
     entity[field]["errors"].append(message)