Revert delete of setpoint_low/_high #5882

Job	Run time
Shellcheck	5s
Dependency	4s
Cache identify	5s
Prepare	9s
Ruff check and force	8s
Check commit	21s
Run pytest using Python 3.13	17s
Run pytest using Python 3.14	20s
Run mypy	13s
Process test coverage	12s
Build and publish Python 🐍 distributions 📦 to TestPyPI	12s
Process test complexity	10s
	2m 16s

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