Nutshell cleanup wishlist #40

Job	Run time
checks / mypy	42s
checks / ruff	5s
checks / formatting	28s
regtest (3.10, 1.5.1, CoreLightningRestWallet) / regtest	2m 48s
regtest (3.10, 1.5.1, LNbitsWallet) / regtest	2m 44s
regtest (3.10, 1.5.1, LndRestWallet) / regtest	2m 37s
tests (ubuntu-latest, 3.9, 1.5.1, FakeWallet) / poetry	1m 24s
tests (ubuntu-latest, 3.10, 1.5.1, FakeWallet) / poetry	1m 28s
	12m 16s

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