fix: correct indentation in AgentManager.__getstate__ to fix IndentationError

The __getstate__ method in AgentManager had an indentation issue where the code handling non-serializable objects was misplaced. The comments and performance_metrics cleanup logic were not properly indented under the method body, causing an IndentationError. Fixed by indenting the relevant code block to be part of the method's implementation.

app.py

@@ -228,17 +228,17 @@ class AgentManager:
         def __getstate__(self):
             """Custom pickling to handle non-serializable objects."""
             state = self.__dict__.copy()
-        # Remove any non-serializable objects if they exist
-        # Remove performance metrics that might contain non-serializable objects
-        if '_performance_metrics' in state:
-            # Create a copy without thread-locked objects
-            safe_metrics = state['_performance_metrics'].copy()
-            # Ensure all values are serializable
-            for key, value in safe_metrics.items():
-                if hasattr(value, '__dict__') and not isinstance(value, (list, dict, str, int, float, bool)):
-                    safe_metrics[key] = str(value)
-            state['_performance_metrics'] = safe_metrics
-        return state
+            # Remove any non-serializable objects if they exist
+            # Remove performance metrics that might contain non-serializable objects
+            if '_performance_metrics' in state:
+                # Create a copy without thread-locked objects
+                safe_metrics = state['_performance_metrics'].copy()
+                # Ensure all values are serializable
+                for key, value in safe_metrics.items():
+                    if hasattr(value, '__dict__') and not isinstance(value, (list, dict, str, int, float, bool)):
+                        safe_metrics[key] = str(value)
+                state['_performance_metrics'] = safe_metrics
+            return state
         
         def __setstate__(self, state):
             """Custom unpickling to restore object state."""