Nutshell cleanup wishlist #57

Job	Run time
checks / mypy	41s
checks / ruff	6s
checks / formatting	25s
regtest (3.10, 1.7.1, CoreLightningRestWallet) / regtest	3m 4s
regtest (3.10, 1.7.1, LNbitsWallet) / regtest	2m 44s
regtest (3.10, 1.7.1, LndRestWallet) / regtest	2m 34s
tests (ubuntu-latest, 3.9, 1.7.1, FakeWallet) / poetry	1m 32s
tests (ubuntu-latest, 3.10, 1.7.1, FakeWallet) / poetry	1m 32s
	12m 38s

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