Migrate to serialx #3407

Job	Run time
Cache identify	7s
Shellcheck	5s
Dependency	6s
Prepare	10s
Ruff check and force	9s
Check commit	35s
Run pytest using Python 3.14	39s
Process test coverage	16s
Run mypy	-1s
Build and publish Python 🐍 distributions 📦 to TestPyPI	16s
Process test complexity	10s
	2m 32s

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