🐛 Add `mypy` Type Check `tools/wsi_registration.py`

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.86%. Comparing base (647d30b) to head (0a7b022).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #831 +/- ## ======================================== Coverage 99.86% 99.86% ======================================== Files 69 69 Lines 8650 8650 Branches 1654 1654 ======================================== Hits 8638 8638 Misses 4 4 Partials 8 8 ```

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