Potential fixes for 3 code quality findings

[annejan]

This PR applies 3/5 suggestions from code quality AI findings. 2 suggestions were skipped to avoid creating conflicts.

Summary by CodeRabbit

• Tests
  • Improved test cleanup reliability by implementing automatic resource restoration during test execution, reducing manual state management overhead.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ai-findings-autofix/tests-auto-util-tst_util.cpp

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[coveralls]

coverage: 20.071%. remained the same
when pulling 1226fea on ai-findings-autofix/tests-auto-util-tst_util.cpp
into 088c840 on main.