Bump to a9 #3263

Job	Run time
Cache identify	4s
Dependency	3s
Shellcheck	4s
Prepare	17s
Ruff check and force	11s
Check commit	1m 21s
Run pytest using Python 3.13	34s
Process test coverage	13s
Run mypy	0s
Build and publish Python 🐍 distributions 📦 to TestPyPI	14s
Process test complexity	8s
	3m 9s

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