Added support for split-beam angle computation with mixed channel beam types in complex mode

[beatfactor]

This PR adds support for computing split-beam angles in datasets where only a subset of channels have valid beam_type values (e.g., beam_type = 1, 17, 49, 65, 81). It applies specifically to CW complex data.

Previously, the presence of an unsupported beam_type would raise a ValueError.

Changes:

• updated get_angle_complex_samples() to process each channel individually if beam_type is not uniform;
• skips channels with unsupported beam_type values and logs a warning instead of failing.

[beatfactor]

I couldn't figure out how to download the test data used in the existing tests, so the test file used in the unit test from this PR is a best guess.

[leewujung]

@beatfactor: the first command in this section will pull all the test files down, and you can stop the other services afterwards.

[beatfactor]

@leewujung Thanks, I managed to download the data by avoiding running the compose script and I added a small script download_test_data.py which only runs the docker container and then copies the test data. Maybe it's useful, but if not I can remove it from this PR.

Lastly, I'm not sure about the check for dask arrays in the _compute_angle_from_complex function but without that the whole function fails when using dask. Also I tried to avoid doing compute to keep the processing lazy. Let me know if there's a better way to handle this or you have another preference.

[beatfactor]

hey @leewujung, any updates here? could you re-trigger the build please?

[leewujung]

@beatfactor : Thanks for the reminder - I just re-triggered the tests and looks like everything runs fine.

I am pretty swamped for the past weeks and hopefully will be able to look at the code changes later next week.

[leewujung]

@beatfactor : somehow the pre-commit.ci pushes were skipped. Could you please add the suggested changes into the code?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 88.88889% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.92%. Comparing base (9f56124) to head (7868b68).
⚠️ Report is 338 commits behind head on main.

Files with missing lines	Patch %	Lines
echopype/consolidate/split_beam_angle.py	92.30%	2 Missing ⚠️
echopype/consolidate/api.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1492      +/-   ##
==========================================
+ Coverage   83.52%   84.92%   +1.39%     
==========================================
  Files          64       79      +15     
  Lines        5686     7016    +1330     
==========================================
+ Hits         4749     5958    +1209     
- Misses        937     1058     +121     

Flag	Coverage Δ
unittests	84.92% <88.88%> (+1.39%)	⬆️

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[beatfactor]

@beatfactor : somehow the pre-commit.ci pushes were skipped. Could you please add the suggested changes into the code?

Ok, done. Yes, it seems that the build won't push the changes if the PR is sent from a Github organization, which it is in this case. Thanks!