[MCC-1476011]Python Lib-Create Get_dataset_versions() function

[ibaig-mdsol]

feature

• Replace this line with Project title.
• MCC-1476011

Checklist

• Review the pull request to fix typos and ensure variable/function names are intuitive, etc.
• Make sure the pull request does not have excessive number of unnecessary commits. Utilize the git commit --amend --no-edit command to reduce commit messages when making small file changes (like changing linespacing).
• Make sure you have added unit tests for the code changes. Tests should be added in the tests/ folder.
• Modify docs, if required. Add any new documentation in the doc/ folder.
• Rebase on latest active development branch (develop/main).

Changes Summary

Replace this section with description of implementation. Should be written in imperative present tense. Summary should be short, but descriptive and highlight changes in the PR.

Deployment Notes

• Returns sorted per AC:

AC 2: It must return a list of all versions, accociated with this dataset, sorted by most recent first.

[Copilot]

Pull request overview

This PR updates the Python DataConnect default service to return dataset versions sorted (newest first) when calling get_dataset_versions(), aligning with the stated acceptance criteria.

Changes:

• Sort get_dataset_versions() results by dataset_version in descending order.
• Add a (currently commented-out) test stub intended to validate sorting behavior.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
dataconnect/service/default.py	Sorts returned dataset versions in descending order by dataset_version.
tests/test_service_default.py	Adds a commented-out test stub for the new sorting behavior (not runnable as-is).

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