fix: add mypy override for PIL imports in integration tests

The CI was failing for Python 3.11 because mypy couldn't find type stubs
for the PIL (Pillow) library, which is imported in the integration tests.
Since PIL is only used optionally in integration tests (with a try/except
fallback), we add a mypy override to ignore missing imports for PIL modules.

This fixes the Python 3.11 CI failures while maintaining type safety for
the rest of the codebase.

Author: jdrhyne

pyproject.toml

@@ -105,6 +105,10 @@ disallow_any_unimported = true
 module = "tests.*"
 disallow_untyped_defs = false
 
+[[tool.mypy.overrides]]
+module = "PIL.*"
+ignore_missing_imports = true
+
 # Pytest configuration moved to pytest.ini
 
 [tool.coverage.run]