Nutshell cleanup wishlist #50

Job	Run time
checks / ruff	7s
checks / mypy	41s
checks / formatting	21s
regtest (3.10, 1.7.1, CoreLightningRestWallet) / regtest	3m 8s
regtest (3.10, 1.7.1, LndRestWallet) / regtest	2m 40s
regtest (3.10, 1.7.1, LNbitsWallet) / regtest	2m 41s
tests (ubuntu-latest, 3.10, 1.7.1, FakeWallet) / poetry	1m 31s
tests (ubuntu-latest, 3.9, 1.7.1, FakeWallet) / poetry	1m 34s
	12m 43s

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