Initial issue: ruff removed imports which looks unused, but they are actually needed and to be honest I also tried to remove those imports and realized they are needed only after tests starts failing.
That gave me idea, but I am not sure is it even possible to implement, if it's fully stupid question just close it.
I am wondering about check that there is no side effects during import: usually when you do import you just want to bring some names to current namespace, but in practice sometimes, in addition to that, you can get some side-effects, for example if you are using django's receiver decorator in imported file, import will also register django signal handler(s).
As for me, good practice is not having any side-effects, so, if it's possible good to have such check.