Fix principal sorting to be alphabetical by name instead of ID

[nikhil6393]

Resolves #238.
This pull request modifies getPrincipalIds() to list users, groups, and roles alphabetically by their name property (instead of relying on Object.keys() which defaults to ID ordering). This ensures the UI properly orders the principals page. I've also updated the related test to expect name-based sorting.

[kmcquade]

Thanks for this, @nikhil6393! 🙏 I've rebased your fix onto current master and resolved the conflicts in #596 — your commit and authorship are preserved there. Two adjustments: the test was updated to add a real name-ordering assertion (master's example dataset was enriched in #583, so the old exact-list expectation no longer applied), and the pyproject.toml uv-version hunk was dropped since master already relaxed it to >=0.11.0. Closing in favor of #596.