Fix bugs issues

shared/messaging/events.py

@@ -3,7 +3,7 @@ Event definitions for microservices communication
 - Simple class-based approach to avoid dataclass issues
 """
 
-from datetime import datetime
+from datetime import datetime, timezone
 from typing import Dict, Any, Optional
 import uuid
 
@@ -14,8 +14,19 @@ class BaseEvent:
         self.data = data
         self.event_type = event_type
         self.event_id = str(uuid.uuid4())
-        self.timestamp = datetime.utcnow()
+        self.timestamp = datetime.now(timezone.utc)
         self.correlation_id = correlation_id
+    
+    def to_dict(self) -> Dict[str, Any]: # Add this method
+        """Converts the event object to a dictionary for JSON serialization."""
+        return {
+            "service_name": self.service_name,
+            "data": self.data,
+            "event_type": self.event_type,
+            "event_id": self.event_id,
+            "timestamp": self.timestamp.isoformat(), # Convert datetime to ISO 8601 string
+            "correlation_id": self.correlation_id
+        }
 
 # Training Events
 class TrainingStartedEvent(BaseEvent):