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 83.20%. Comparing base (79fcafa) to head (969d39f).
Report is 5 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #457   +/-   ##
=======================================
  Coverage   83.20%   83.20%           
=======================================
  Files         103      103           
  Lines       12227    12227           
  Branches     1546     1546           
=======================================
  Hits        10174    10174           
  Misses       1642     1642           
  Partials      411      411           

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