PlugwiseRequest class: handle no NodeResponse expected #1455

Job	Run time
Shellcheck	9s
Prepare	50s
Dependency	3s
Ruff check and force	7s
Check commit	56s
Create pytest cache for Python 3.13	10s
Run pytest using Python 3.13	18s
Process test coverage	10s
Run mypy	5s
Build and publish Python 🐍 distributions 📦 to TestPyPI	19s
Process test complexity	11s
	3m 18s

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