Fix live interview code grading

apps/assessments/serializers.py

@@ -54,3 +54,4 @@ class ExecuteCodeSerializer(serializers.Serializer):
     code = serializers.CharField()
     language = serializers.CharField()
     stdin = serializers.CharField(required=False, allow_blank=True)
+    expected_output = serializers.CharField(required=False, allow_blank=True)

apps/assessments/views.py

@@ -177,7 +177,7 @@ class ExecuteCodeView(views.APIView):
                 serializer.validated_data['code'],
                 serializer.validated_data['language'],
                 serializer.validated_data.get('stdin', ''),
-                ''
+                serializer.validated_data.get('expected_output', '')
             )
             return Response(result, status=status.HTTP_200_OK)