[Bug]: Parity gap for callback error between python and TS sdk

[wangyb-A]

Expected Behavior

When there is error in callback, typescript sdk raise CallbackError.

Actual Behavior

Python is raising callable error.

https://github.com/aws/aws-durable-execution-sdk-python/blob/main/src/aws_durable_execution_sdk_python/context.py#L143

Steps to Reproduce

test cases to reproduce have been written in:
aws/aws-durable-execution-sdk-python-testing#158

SDK Version

1.0.0

Python Version

3.14

Is this a regression?

No

Last Working Version

No response

Additional Context

We should match the error type with TS sdk.