Sag-py-fastapi-health

Update code and requirements for Python 3.12

update/ maintenance

- Added proper fix for "TypeError: issubclass() arg 1 must be a class"

**Breaking**
=> There might be rare cases where you have typing for the status. Ensure that you use Literal of typing_extensions instead of typings.

- Fix "TypeError: issubclass() arg 1 must be a class" on importing the lib