[Bug]: Callback examples failing in main branch

[zhongkechen]

Expected Behavior

All test examples succeed

Actual Behavior

e.g. https://github.com/aws/aws-durable-execution-sdk-python-testing/actions/runs/24865632639/job/72800930650

Steps to Reproduce

Trigger examples workflow from main branch

SDK Version

1.4.0

Python Version

3.14

Is this a regression?

No

Last Working Version

No response

Additional Context

No response