WEBDEV-7550: Add metadata accessors

[jbuckner]

No description provided.

[github-actions]

PR Preview Action v1.6.2
🚀 View preview at https://internetarchive.github.io/iaux-item-metadata/pr/pr-34/
Built to branch gh-pages at 2025-08-14 13:18 UTC. Preview will be ready when the GitHub Pages deployment is complete.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.19%. Comparing base (907477a) to head (55b3f7b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
+ Coverage   68.56%   72.19%   +3.62%     
==========================================
  Files          11       11              
  Lines         789      863      +74     
  Branches       16       25       +9     
==========================================
+ Hits          541      623      +82     
+ Misses        248      240       -8     

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