Correctly store sample_counts timestamps as seconds

[samuelbray32]

• Error identified where the timesteps in sample_counts was innapropriately scaled to nanoseconds, even though units required to be seconds
• Correctly stores as seconds and adjusts test

[Copilot]

Pull Request Overview

Fixes timestamp scaling bug in sample_counts where timestamps were incorrectly scaled to nanoseconds instead of being stored as seconds as required by the NWB format.

• Removes nanosecond scaling multiplication from sample_counts timestamp processing
• Adds test adjustment to account for the timestamp unit correction when comparing with old files

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/trodes_to_nwb/convert_intervals.py	Removes incorrect nanosecond scaling from systime timestamps
src/trodes_to_nwb/tests/test_convert_intervals.py	Adds nanosecond conversion factor and adjusts test to handle unit correction

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.73%. Comparing base (5359ff6) to head (b67db5c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #150   +/-   ##
=======================================
  Coverage   89.73%   89.73%           
=======================================
  Files          13       13           
  Lines        1704     1704           
=======================================
  Hits         1529     1529           
  Misses        175      175           

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