fake_cache only to return string or bool #2606

Job	Run time
Cache identify	4s
Dependency	5s
Shellcheck	4s
Prepare	8s
Ruff check and force	8s
Check commit	33s
Run pytest using Python 3.13	28s
Process test coverage	18s
Run mypy	0s
Process test complexity	12s
Build and publish Python 🐍 distributions 📦 to TestPyPI	10s
	2m 10s

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