test: add fallback settings fields to runner test stubs

tests/test_runner_interrupt.py

@@ -28,6 +28,8 @@ def _wire_runner(monkeypatch: pytest.MonkeyPatch, tmp_path: Any) -> None:
             timeout=300,
             prompt_cache=True,
             extra_headers=None,
+            fallback_model=None,
+            denied_retries=3,
         ),
         runtime=types.SimpleNamespace(max_context_images=3),
     )

tests/test_runner_rate_limit.py

@@ -42,6 +42,8 @@ async def test_persistent_rate_limit_stops_gracefully(
             timeout=300,
             prompt_cache=True,
             extra_headers=None,
+            fallback_model=None,
+            denied_retries=3,
         ),
         runtime=types.SimpleNamespace(max_context_images=3),
     )

tests/test_runner_root_prompt.py

@@ -50,6 +50,8 @@ def _patch_engine_scaffold(
             timeout=300,
             prompt_cache=True,
             extra_headers=None,
+            fallback_model=None,
+            denied_retries=3,
         ),
         runtime=types.SimpleNamespace(max_context_images=3),
     )

tests/test_runner_teardown.py

@@ -52,6 +52,8 @@ def _settings() -> Any:
             timeout=300,
             prompt_cache=True,
             extra_headers=None,
+            fallback_model=None,
+            denied_retries=3,
         ),
         runtime=types.SimpleNamespace(max_context_images=3),
     )