- Add mypy override in pyproject.toml to relax strict typing for test files
- Update test fixtures to use _connection_pool instead of deprecated _client
- Fix datetime type mismatches in test fixtures (use datetime objects, not strings)
- Add type annotations to inner functions in test_multi_project_switching.py
- Fix union type handling in test assertions with isinstance checks
Reduces mypy errors from 216 to 0. All 168 tests still pass.
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Co-Authored-By: Claude <noreply@anthropic.com>
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