* feat: enhance flow event state management
- Added `state` attribute to `FlowFinishedEvent` to capture the flow's state as a JSON-serialized dictionary.
- Updated flow event emissions to include the serialized state, improving traceability and debugging capabilities during flow execution.
* fix: improve state serialization in Flow class
- Enhanced the `_copy_and_serialize_state` method to handle exceptions during JSON serialization of Pydantic models, ensuring robustness in state management.
- Updated test assertions to access the state as a dictionary, aligning with the new state structure.
---------
Co-authored-by: Greyson LaLonde <greyson.r.lalonde@gmail.com>
4ae8c36815