Nutshell cleanup wishlist #38

Job	Run time
checks / mypy	37s
checks / formatting	24s
checks / ruff	5s
regtest (3.10, 1.5.1, CoreLightningRestWallet) / regtest	2m 53s
regtest (3.10, 1.5.1, LNbitsWallet) / regtest	2m 42s
regtest (3.10, 1.5.1, LndRestWallet) / regtest	2m 28s
tests (ubuntu-latest, 3.10, 1.5.1, FakeWallet) / poetry	1m 25s
tests (ubuntu-latest, 3.9, 1.5.1, FakeWallet) / poetry	1m 29s
	12m 3s

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