Fix mypy tests (#1444) #1588

Job	Run time
Check types using pyright	12s
Build & verify package	15s
Verify dev env	8s
Tests on pypy-3.10	19s
Run doctests & render changelog	18s
Tests & Mypy on 3.9	33s
Tests & Mypy on 3.12	1m 8s
Tests & Mypy on 3.10	1m 12s
Tests & Mypy on 3.13	1m 23s
Tests & Mypy on 3.14	2m 6s
Tests & Mypy on 3.11	55s
Combine & check coverage	11s
required-checks-pass	2s
	8m 42s

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