Set to v1.12.0a1 for testing #6048

Job	Run time
Dependency	4s
Cache identify	4s
Shellcheck	15s
Prepare	1m 9s
Ruff check and force	10s
Check commit	22s
Run pytest using Python 3.13	1m 20s
Run pytest using Python 3.14	18s
Run mypy	12s
Process test coverage	17s
Process test complexity	8s
Build and publish Python 🐍 distributions 📦 to TestPyPI	18s
	4m 37s

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