DM-47673: v28 release notes (cherry-picked)

[timj]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.73%. Comparing base (34f2479) to head (6aed65b).
Report is 4 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #314   +/-   ##
=======================================
  Coverage   89.73%   89.73%           
=======================================
  Files          50       50           
  Lines        4520     4520           
  Branches      414      414           
=======================================
  Hits         4056     4056           
  Misses        340      340           
  Partials      124      124           

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