Add typing, and minor tweaks

[sergeyklay]

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[codecov]

Codecov Report

Attention: Patch coverage is 89.47368% with 2 lines in your changes missing coverage. Please review.

Project coverage is 54.47%. Comparing base (5a0b5d1) to head (5dfdba5).
Report is 17 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
clusx/evaluation.py	75.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #61   +/-   ##
=======================================
  Coverage   54.47%   54.47%           
=======================================
  Files          12       12           
  Lines        1050     1050           
  Branches      140      140           
=======================================
  Hits          572      572           
  Misses        466      466           
  Partials       12       12           

Flag	Coverage Δ
unittests	54.47% <89.47%> (ø)

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