- Changed datetime.UTC to timezone.utc in advanced_ai.py
- Changed datetime.UTC to timezone.utc in realtime_learning.py
- Changed datetime.UTC to timezone.utc in jwt_handler.py
- Changed datetime.UTC to timezone.utc in distributed_consensus.py
- Changed datetime.UTC to timezone.utc in exceptions.py
- Changed datetime.UTC to timezone.utc in alerting.py
- Changed datetime.UTC to timezone.utc in communication.py
- Changed datetime.UTC to timezone.utc in message_types.py
- Updated imports from `datetime import
