Pre commit tweaks

[harrisonpim]

drive-by PR with some tiny tweaks, while setting up the targets-sprint-cop28 repo

• tidies up the dev dependency groups
• adds a poetry lock file check
• autoformats with ruff instead of black (including notebooks)

[mpjuhasz]

LGTM -- any particular reason why we should be moving to ruff from black?

[harrisonpim]

there are a couple of reasons:

• ruff's much faster than black
• we were already running ruff
• their outputs should be approximately identical!

all of those reasons are minor though, so i'm happy to be swayed back to black if people have stronger feelings!

[kdutia]

@harrisonpim do we need this in there too? https://docs.astral.sh/ruff/faq/#does-ruff-support-jupyter-notebooks

[harrisonpim]

it's there already, but in a different way! i've verified that it works with both scripts and notebooks