Nutshell cleanup wishlist #59

Job	Run time
checks / ruff	6s
checks / mypy	42s
checks / formatting	28s
regtest (3.10, 1.7.1, CoreLightningRestWallet) / regtest	1m 36s
regtest (3.10, 1.7.1, LNbitsWallet) / regtest	1m 37s
regtest (3.10, 1.7.1, LndRestWallet) / regtest	1m 36s
tests (ubuntu-latest, 3.10, 1.7.1, FakeWallet) / poetry	1m 42s
tests (ubuntu-latest, 3.9, 1.7.1, FakeWallet) / poetry	1m 31s
	9m 18s

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