[Bug]: Plugin hooks can return operations with negative duration

[nvasiu]

Expected Behavior

OperationStartInfo.start_time should always be before OperationEndInfo.end_time.

Actual Behavior

OperationStartInfo.start_time uses datetime.now(), while OperationEndInfo.end_time uses recorded operation timestamps.

It is possible for operations to record an end_time that precedes the now() call, resulting in a negative duration. Plugins consuming these callbacks will get invalid timings.

Steps to Reproduce

1. Register a plugin that records the start time from on_operation_start and on_operation_end.
2. Run a durable handler with a fast context step (returns immediately).
3. Compare the start/end times in OperationStartInfo and OperationEndInfo

SDK Version

1.7.0

Python Version

3.14

Is this a regression?

No

Last Working Version

No response

Additional Context

No response