Update spike time calculations for scattered non-spiking units

[CodyCBakerPhD]

Update session duration spike-time boundary handling to correctly support multiple non-spiking units scattered throughout a Units table, not just when the first unit is non-spiking.

The implementation now keeps only unit boundaries where cumulative spike count increases, which avoids invalid indexing from repeated boundaries contributed by non-spiking rows while preserving correct min/max spike-time extraction.

Also adds a regression test covering interleaved spiking and non-spiking unit rows to validate the expected session duration behavior.

[codecov]

Codecov Report

❌ Patch coverage is 96.15385% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 76.77%. Comparing base (a30de62) to head (6742b80).

Files with missing lines	Patch %	Lines
dandi/pynwb_utils.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1871      +/-   ##
==========================================
+ Coverage   76.75%   76.77%   +0.01%     
==========================================
  Files          87       87              
  Lines       12788    12805      +17     
==========================================
+ Hits         9816     9831      +15     
- Misses       2972     2974       +2     

Flag	Coverage Δ
unittests	76.77% <96.15%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[CodyCBakerPhD]

@copilot Please add one new test for this case (of having multiple non-spiking units scattered throughout the rows of a untis table)

[Copilot]

@copilot Please add one new test for this case (of having multiple non-spiking units scattered throughout the rows of a untis table)

Added in commit 9acfc582: a new regression test (test_session_duration_with_scattered_non_spiking_units) covering multiple non-spiking units scattered throughout the Units table, plus the corresponding spike-index handling fix in _get_session_duration.

[CodyCBakerPhD]

@yarikoptic I recommend merging #1872 first

[CodyCBakerPhD]

@yarikoptic OK ready - a user needed this to upload some data

[CodyCBakerPhD]

@yarikoptic ping again

[yarikoptic]

coolio, thanks! filed

• #1877

for longer term. IMHO we seems to be getting too much "analytical" here ;)