Enforce mypy for CLI

[MonkeyCanCode]

Is your feature request related to a problem? Please describe.

Currently we have mypy enabled but only for integration_tests dir (https://github.com/apache/polaris/blob/main/client/python/.pre-commit-config.yaml#L39C17-L39C34). This seems to be odd to have mypy only for integration but not for the actual CLI code base. If we do want to enforce code quality for static type checking via mypy, I would think we should do it on the actual code base for CLI.

Describe the solution you'd like

Enable mypy for actual CLI code base.

Describe alternatives you've considered

No response

Additional context

No response

[MonkeyCanCode]

Let me know if this is something we would like to support then I will make the needed changes (the existed CLI code base is not 100% static type validated) cc @HonahX @eric-maynard @flyrain

[flyrain]

Makes sense to enable the static type checking. BTW, did you see errors caught while enabling it?

[MonkeyCanCode]

Makes sense to enable the static type checking. BTW, did you see errors caught while enabling it?

Yes. Because there are many missing type hint. If no concern, I can proceed with the needed changes later this week.

[adam-christian-software]

This is fantastic! Thanks for filing this!