Nutshell cleanup wishlist #76

Job	Run time
checks / formatting	25s
checks / ruff	4s
checks / mypy	36s
tests (ubuntu-latest, 3.10, 1.7.1, FakeWallet) / poetry	1m 33s
regtest (3.10, 1.7.1, LndRestWallet) / regtest	2m 36s
regtest (3.10, 1.7.1, CoreLightningRestWallet) / regtest	3m 0s
tests (ubuntu-latest, 3.9, 1.7.1, FakeWallet) / poetry	1m 31s
regtest (3.10, 1.7.1, LNbitsWallet) / regtest	2m 48s
	12m 33s

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