[BI-1704] When downloading phenotype data, now returns the most recent

[davedrp]

BI-1704 - If there are repeat measures for a specific observation unit/trait combo, then the phenotype download will return the oldest observation as determined by the collection date of the observation stored in the database. This is inconsistent with a user's expectation that the latest observation be returned in the file.

see Issue 4419

Checklist

• [ ] Refactoring only
• [ ] Documentation only
• [ ] Fixture update only
• [X] Bug fix
  • [ ] The relevant issue has been closed.
  • [ ] Further work is required.
• [ ] New feature
  • [ ] Relevant tests have been created and run.
  • [ ] Data was added to the fixture
  • [ ] Data was added via a patch in /t/data/fixture/patches/.
  • [ ] User-Facing Change
  • [ ] The user manual in /docs has been updated.
  • [ ] Any new Perl has been documented using perldoc.
  • [ ] Any new JavaScript has been documented using JSDoc.
  • [ ] Any new legacy JavaScript has been moved from /js to /js/source/legacy.

[timparsons]

Has this change been discussed with the Breedbase team? If so, maybe we can create another PR to merge upstream.

Yes, https://github.com/solgenomics/sgn/issues/4419 was opened and discussed at their lab meeting a couple of weeks ago. I think we'll need to apply this fix in our develop branch to then be able to push upstream