Revert delete of setpoint_low/_high #5885

Job	Run time
Cache identify	6s
Shellcheck	4s
Dependency	5s
Prepare	8s
Ruff check and force	10s
Check commit	21s
Run pytest using Python 3.13	16s
Run pytest using Python 3.14	19s
Run mypy	16s
Process test coverage	18s
Process test complexity	12s
Build and publish Python 🐍 distributions 📦 to TestPyPI	7s
	2m 22s

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