[xunyoyo]

Summary

• align SplitwiseConnector cache synchronization tests with the current public API
• add coverage for additional connection and cache info branches to improve module coverage

Testing

• pytest -c tests/cov_pytest.ini tests/splitwise/test_splitwise_connector.py
• python -m coverage run -m pytest -c tests/cov_pytest.ini tests/splitwise/test_splitwise_connector.py
• python -m coverage report -m --include="fastdeploy/splitwise/splitwise_connector.py"
• pre-commit run --files tests/splitwise/test_splitwise_connector.py

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Codex Task