Prioritize SCA-required responses over generic init errors

[mo22]

When a response message contains both a generic not-yet-open-dialog 9xxx error, such as 9050, and a later 9075 response, the generic PIN/auth handling currently runs first. That blocks the PIN and raises FinTSClientPINError before the explicit strong-customer-authentication response is inspected.\n\nThis pre-scans the HIRMG/HIRMS response set while processing a message and lets the explicit 9075 handling take precedence over generic unopened-dialog 9xxx handling. Explicit PIN-related return codes still block the PIN as before.\n\nTested with:\n\n uv run --with pytest pytest tests/test_client.py::test_sca_required_takes_precedence_over_unopened_dialog_error\n uv run --with pytest pytest tests/test_client.py