Strengthen code as suggested #6206

Job	Run time
Cache identify	5s
Shellcheck	5s
Dependency	4s
Prepare	6s
Ruff check and force	10s
Check commit	20s
Run pytest using Python 3.14	14s
Run pytest using Python 3.13	15s
Run mypy	11s
Process test coverage	10s
Process test complexity	7s
Build and publish Python 🐍 distributions 📦 to TestPyPI	7s
	1m 54s

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