🛡️ Shield: Test invalid type handling in Airflow Hook

[fderuiter]

🛑 Vulnerability: The Airflow ImednetHook plugin lacked test coverage for defensive checks when receiving unexpectedly typed configuration values (e.g. integer passwords) from the external Airflow Connection store. This could mask configuration bugs when using Airflow UI or secret backends.

🛡️ Defense: Added three boundary type unit tests (test_imednet_hook_non_dict_extras, test_imednet_hook_non_string_login, test_imednet_hook_non_string_password) to explicitly verify that the hook uses safe fallback types correctly without crashing before handing the payload off to the core SDK config loader.

🔬 Verification: poetry run pytest --cov=src/imednet/integrations/airflow/hooks/ --cov-report=term-missing tests/unit/test_airflow_integration.py

📊 Impact: Resolves 4 missing lines of test coverage (now 100%) in src/imednet/integrations/airflow/hooks/__init__.py, increasing overall suite confidence against invalid Airflow Connection metadata.

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PR created automatically by Jules for task 9862270758117004884 started by @fderuiter

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