Update analyze npq

[joshqsumner]

Describe your changes
Updated analyze.npq for new class structure and changed PSII_Data class to have ojip_light and ojip_dark attributes available if psl/psd/npq data was used.

Type of update
This is a feature update.

Associated issues
Part of #1926

Additional context
Follows after #1973 , this time strictly.

For the reviewer
See this page for instructions on how to review the pull request.

• PR functionality reviewed in a Jupyter Notebook
• All tests pass
• Test coverage remains 100%
• Documentation tested
• New documentation pages added to plantcv/mkdocs.yml
• Changes to function input/output signatures added to updating.md
• Code reviewed
• PR approved

[deepsource-io]

DeepSource Code Review

We reviewed changes in 0a9cf06...1029bec on this pull request. Below is the summary for the review, and you can see the individual issues we found as inline review comments.

See full review on DeepSource ↗

PR Report Card

Overall Grade

Security   Reliability   Complexity   Hygiene   Coverage

Code Review Summary

Analyzer	Status	Updated (UTC)	Details
Python		Jul 17, 2026 8:59p.m.	Review ↗
Code coverage		Jul 17, 2026 8:59p.m.	Review ↗

Code Coverage Summary

Language	Line Coverage (New Code)	Line Coverage (Overall)
Aggregate	100% [✓ above threshold]	100%
Python	100% [✓ above threshold]	100%

➟ Additional coverage metrics may have been reported. See full coverage report ↗

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