Save cache at suitable moments. #2812

Job	Run time
Shellcheck	4s
Cache identify	3s
Dependency	5s
Prepare	7s
Ruff check and force	13s
Check commit	31s
Run pytest using Python 3.13	31s
Process test coverage	12s
Run mypy	-1s
Build and publish Python 🐍 distributions 📦 to TestPyPI	10s
Process test complexity	8s
	2m 3s

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