Nutshell cleanup wishlist #92

Job	Run time
checks / formatting	22s
checks / mypy	34s
checks / ruff	5s
regtest (3.10, 1.7.1, CoreLightningRestWallet) / regtest	3m 7s
regtest (3.10, 1.7.1, LNbitsWallet) / regtest	2m 44s
regtest (3.10, 1.7.1, LndRestWallet) / regtest	2m 37s
tests (ubuntu-latest, 3.10, 1.7.1, false, FakeWallet) / poetry	1m 33s
tests (ubuntu-latest, 3.10, 1.7.1, true, FakeWallet) / poetry	1m 35s
	12m 37s

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