Sort principals alphabetically by name instead of ID (resolves #238)

[kmcquade]

Sorts the principals page alphabetically by name instead of by the opaque IAM ID. Resolves #238.

getPrincipalIds() previously returned Object.keys(...).sort() — i.e. sorted by the underlying IAM ID (AROA…/AIDA…), which renders as an apparently-random order in the UI. It now sorts by each principal's .name (case-insensitive localeCompare, falling back to the ID when a name is absent).

Credit / provenance

Supersedes #557 by @nikhil6393 — their commit and authorship are preserved here. I rebased it onto current master and made two maintainer adjustments:

1. Updated the test for the enriched dataset. Master's example data was expanded (feat: enrich example dataset for a high-quality demo report + lock fixtures in sync #583) and principals-test.js now uses membership assertions. Rather than reverting to the old 2-element exact list, this keeps the membership assertion and adds a real ordering check: it re-derives the principal names in the returned order and asserts they're non-decreasing (mirroring the implementation's comparator). That fails on the old ID-sort and passes on the new name-sort, so it actually covers Principals page should list IAM roles/groups/users in alphabetical order #238.
2. Dropped the pyproject.toml uv-version hunk. It relaxed ~=0.10.0 → >=0.10.0, but master is already at >=0.11.0, so it's obsolete.

Notes

• getPrincipalNames() still uses a default (case-sensitive) sort. Left as-is to keep this change focused on Principals page should list IAM roles/groups/users in alphabetical order #238; worth aligning to the same case-insensitive comparator in a follow-up so the names list and IDs list order identically.

Tests

just test-js → 47 passing, including getPrincipalIds.

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