[Bug]: Console doesn't show Step attempts properly when using Python SDK

[zhongkechen]

Expected Behavior

Console shows attempts in the timeline, e.g. with TypeScript SDK:

Actual Behavior

Console doesn't show the attempts properly in the timeline with Python SDK:

Steps to Reproduce

1. create a step that is always failing
2. trigger an execution
3. check the console for its attempts

SDK Version

1.4

Python Version

3.14

Is this a regression?

No

Last Working Version

No response

Additional Context

No response