do not force a judge when we pass None judge engine

Author: Mortimerp9

are/simulation/scenarios/scenario_imported_from_json/utils.py

@@ -381,14 +381,16 @@ def preprocess_scenario_from_config(
     # Preprocess the scenario
     if not config.oracle:
         # Create judge configuration using provided parameters
-        from are.simulation.validation.configs import (
-            GraphPerEventJudgeConfig,
-            create_judge_engine,
-        )
-
-        judge_engine = create_judge_engine(config.judge_engine_config)
+        # If judge_engine_config is None, skip judge creation entirely
+        judge_config = None
+        if config.judge_engine_config is not None:
+            from are.simulation.validation.configs import (
+                create_judge_engine,
+                GraphPerEventJudgeConfig,
+            )
 
-        judge_config = GraphPerEventJudgeConfig(engine=judge_engine)
+            judge_engine = create_judge_engine(config.judge_engine_config)
+            judge_config = GraphPerEventJudgeConfig(engine=judge_engine)
 
         preprocess_scenario(
             scenario=scenario,