🐛 Fix Type Annotation for `annotation/storage.py`

[codecov[bot]]

Codecov Report

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

Project coverage is 99.89%. Comparing base (14f1215) to head (d816306).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #824 +/- ## ======================================== Coverage 99.89% 99.89% ======================================== Files 69 69 Lines 8650 8650 Branches 1653 1653 ======================================== Hits 8641 8641 Misses 1 1 Partials 8 8 ```

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