Nutshell cleanup wishlist #58

Job	Run time
checks / formatting	26s
checks / ruff	6s
checks / mypy	36s
regtest (3.10, 1.7.1, CoreLightningRestWallet) / regtest	2m 54s
regtest (3.10, 1.7.1, LNbitsWallet) / regtest	2m 43s
tests (ubuntu-latest, 3.10, 1.7.1, FakeWallet) / poetry	1m 34s
tests (ubuntu-latest, 3.9, 1.7.1, FakeWallet) / poetry	1m 31s
regtest (3.10, 1.7.1, LndRestWallet) / regtest	2m 40s
	12m 30s

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