chore(aosd): Improve the wording of validation error messages

[sschuberth]

Quote the actual value, where meaningful, to ease debugging.

Closes #10744.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.38%. Comparing base (a153739) to head (6c9aa9f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main   #10777   +/-   ##
=========================================
  Coverage     57.38%   57.38%           
  Complexity     1673     1673           
=========================================
  Files           346      346           
  Lines         12759    12759           
  Branches       1209     1209           
=========================================
  Hits           7322     7322           
  Misses         4972     4972           
  Partials        465      465           

Flag	Coverage Δ
funTest-docker	71.15% <ø> (ø)
funTest-non-docker	32.98% <ø> (-0.04%)	⬇️
test-ubuntu-24.04	41.90% <ø> (ø)
test-windows-2025	41.88% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[daudiihhdau]

Thank you very much! Great job :-)