[ian-sift]

Summary

• Run.start_time and Run.stop_time are nanosecond pandas.Timestamp values, the same resolution as channel data from get_data.
• A time axis built from a run and read as integers now uses nanoseconds. Previously the bounds were microsecond datetime values, and interpolation against channel data filled with NaN.
• The fields stay annotated as datetime. pandas.Timestamp is a datetime subclass, and annotating the field as Timestamp makes pydantic refuse to build the model.

Test plan

• pytest lib/sift_client/_tests/sift_types/test_run.py covers a sub-microsecond start, an exact-second stop, unset bounds, unit == "ns", and a date_range whose integer values match the start.
• ruff check and ruff format --check on the changed files.
• On pandas 3.0.3, date_range of these bounds is datetime64[ns]. date_range of the old datetime bounds is datetime64[us].

[github-actions]

Python docs preview: https://sift-stack.github.io/sift/python/pr-857/

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