BUG: fix handling of corrupted Flight object in InfinityEncoder

Author: aasitvora99

src/utils.py

@@ -73,8 +73,30 @@ def default(self, o):
                     mutate_self=False,
                 )
         if isinstance(obj, Flight):
-            obj._Flight__evaluate_post_process()
-            solution = np.array(obj.solution)
+            try:
+                evaluate_post_process = getattr(obj, '_Flight__evaluate_post_process', None)
+                
+                # Check if it's corrupted (numpy array instead of cached_property)
+                if isinstance(evaluate_post_process, np.ndarray):
+                    try:
+                        delattr(obj, '_Flight__evaluate_post_process')
+                        
+                        restored_method = getattr(obj, '_Flight__evaluate_post_process', None)
+                        if restored_method and callable(restored_method):
+                            restored_method()
+                    except Exception as fix_error:
+                        logger.error(f"Error fixing _Flight__evaluate_post_process: {fix_error}")
+                        
+                elif evaluate_post_process is not None and callable(evaluate_post_process):
+                    evaluate_post_process()
+                    
+            except (AttributeError, TypeError, ValueError) as e:
+                logger.error(f"Error handling Flight object corruption: {e}")
+            
+            try:
+                solution = np.array(obj.solution)
+            except Exception as e:
+                return super().default(obj)  # Fall back to parent encoder
             size = len(solution)
             if size > 25:
                 reduction_factor = size // 25