tests/gateway/test_model_switch_persistence.py::TestApplySessionModelOverride::test_override_replaces_all_fields
tests/gateway/test_model_switch_persistence.py::TestApplySessionModelOverride::test_no_override_returns_originals
tests/gateway/test_model_switch_persistence.py::TestApplySessionModelOverride::test_none_values_do_not_overwrite
tests/gateway/test_model_switch_persistence.py::TestApplySessionModelOverride::test_empty_string_overwrites
tests/gateway/test_model_switch_persistence.py::TestApplySessionModelOverride::test_different_session_key_not_affected
tests/gateway/test_model_switch_persistence.py::TestIsIntentionalModelSwitch::test_matches_override
tests/gateway/test_model_switch_persistence.py::TestIsIntentionalModelSwitch::test_no_override_returns_false
tests/gateway/test_model_switch_persistence.py::TestIsIntentionalModelSwitch::test_different_model_returns_false
tests/gateway/test_model_switch_persistence.py::TestIsIntentionalModelSwitch::test_wrong_session_key