re-add self._loaded #2105

Job	Run time
Dependency	4s
Prepare	46s
Shellcheck	4s
Ruff check and force	6s
Check commit	42s
Create pytest cache for Python 3.13	13s
Run pytest using Python 3.13	23s
Process test coverage	17s
Run mypy	5s
Process test complexity	6s
Build and publish Python 🐍 distributions 📦 to TestPyPI	39s
	3m 25s

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