Type hinting needed for 'psycopg2' and 'psutil' functions

[tareqpi]

I am currently working on a project that checks for static typing in its CI workflow. When running mypy, errors occur because untyped third-party libraries functions are called in a typed context in the project. Therefore, the addition of the correct type hinting is needed so that mypy stops complaining. Below is the mentioned test result.

https://github.com/tareqpi/Nominatim/runs/7705136880?check_suite_focus=true#step:14:12

[Akuli]

I recommend adding disable_error_code = no-untyped-call to your mypy.ini. This tells mypy to not complain when you call untyped functions. Lots of things are still untyped, so limiting yourself to functions that happen to be typed isn't reasonable yet.