Fix lint errors

[waxlamp]

I noticed a few linting errors popping up in CI. This PR fixes them, in three bits:

1. Update pyproject.toml to use the correct ruff config section names.
2. Eliminate some explicit dictionary key checks in favor of dict.get().
3. Use logging.getLogger() in place of directly instantiating a Logger object.

I believe (1) and (2) are fine (though I'd appreciate validation); (3) might be trickier: although the change I made is a best practice (even recommended directly by the docs for the logging module), it does represent a semantic change in the codebase.

Let me know if I should peel off one or more of these commits into separate PRs--glad to do so if it makes reviewing/merging easier.

[yarikoptic]

could this be reviewed/merged asap so nobody wastes time chasing those CI fails?

[dandibot]

🚀 PR was released in v0.3.75 🚀