photol rates diagnostics

[Zubair Maalick (zmaalick)]

PR Summary

Sci/Tech Reviewer:
Code Reviewer: Alistair Pirrie (@mo-alistairp)

Code Quality Checklist

• I have performed a self-review of my own code
• My code follows the project's style guidelines
• Comments have been included that aid understanding and enhance the readability of the code
• My changes generate no new warnings
• All automated checks in the CI pipeline have completed successfully

Testing

• I have tested this change locally, using the LFRic Apps rose-stem suite
• If any tests fail (rose-stem or CI) the reason is understood and acceptable (e.g. kgo changes)
• I have added tests to cover new functionality as appropriate (e.g. system tests, unit tests, etc.)
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trac.log

Security Considerations

• I have reviewed my changes for potential security issues
• Sensitive data is properly handled (if applicable)
• Authentication and authorisation are properly implemented (if applicable)

Performance Impact

• Performance of the code has been considered and, if applicable, suitable performance measurements have been conducted

AI Assistance and Attribution

• Some of the content of this change has been produced with the assistance of Generative AI tool name (e.g., Met Office Github Copilot Enterprise, Github Copilot Personal, ChatGPT GPT-4, etc) and I have followed the Simulation Systems AI policy (including attribution labels)

Documentation

• Where appropriate I have updated documentation related to this change and confirmed that it builds correctly

PSyclone Approval

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Sci/Tech Review

• I understand this area of code and the changes being added
• The proposed changes correspond to the pull request description
• Documentation is sufficient (do documentation papers need updating)
• Sufficient testing has been completed

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Code Review

• All dependencies have been resolved
• Related Issues have been properly linked and addressed
• CLA compliance has been confirmed
• Code quality standards have been met
• Tests are adequate and have passed
• Documentation is complete and accurate
• Security considerations have been addressed
• Performance impact is acceptable

[github-actions]

Hello Zubair Maalick (@zmaalick)! 👋

Thank you for your contribution. Since this is your first time contributing to this repository, we ask that you sign our Contributor Licence Agreement (CLA).

📄 You can read the CLA here.

To agree to the CLA, please add your details (GitHub username, Real Name, Affiliation, and Date) to the CONTRIBUTORS.md file (create one, if required) in the development branch for this PR. After signing the CLA, you won't need to do this again for future PRs.

[iboutle]

I'm slightly concerned that this code is adding a diagnostic calculation, without any control over whether the diagnostic is actually requested in the output. I'm not surprised because the surrounding code is the same, but I suspect we should do better? Should we be adding logic to determine if the diagnostic is actually requested before calculating it.