add mypy strict type checks to ci pipeline

[ekneg54]

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

As a performance hungry application it could be very useful for performance improving measures like mypyc, pypy, numba or rewrites in rust to have a relative good typed code.
our performance hunger does not permit to check all inputs in functions and methods, so this should be enforced and checkt way before our code hits a production environment.

Describe the solution you'd like

we should implement mypy to enforce strict typing and type checks in the ci pipeline.
At first we should enforce that touched files in a PR should be consequently typed.

Describe alternatives you've considered

none

Additional context

none