Add schedule smoke test routine

tests/test_schedule_smoke_script.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+import importlib.util
+from pathlib import Path
+
+
+def _load_script():
+    path = Path(__file__).parent.parent / "scripts" / "smoke_test_schedule.py"
+    spec = importlib.util.spec_from_file_location("smoke_test_schedule", path)
+    assert spec is not None
+    module = importlib.util.module_from_spec(spec)
+    assert spec.loader is not None
+    spec.loader.exec_module(module)
+    return module
+
+
+def test_schedule_smoke_script_dry_run_contract() -> None:
+    script = _load_script()
+    args = script.parse_args([
+        "--activity-id",
+        "00000000-0000-0000-0000-000000000123",
+        "--recreate-recurring",
+        "--dry-run",
+    ])
+
+    report = script.build_dry_run_report(args)
+
+    assert report["mode"] == "dry-run"
+    assert report["activity_id"] == "00000000-0000-0000-0000-000000000123"
+    assert report["recreate_recurring"] is True
+    assert report["delay_seconds"] == 60
+    assert "create a one-shot smoke Temporal Schedule one minute in the future" in report["checks"]