added multidevice support

python_app/workflows/calibration_workflow.py

@@ -17,6 +17,13 @@ def capture_calibration_set(
     store: NpzStore,
 ) -> tuple[str, SweepCollection]:
     """Capture all switch combinations and persist them as calibration set."""
+    if config.is_multi_device:
+        raise RuntimeError(
+            "LibreVNA multi-device S21 through calibration is not supported by this one-shot full-set helper. "
+            "Use the sequential preprocess capture flow so each virtual combo can be connected through "
+            "and captured explicitly."
+        )
+
     combos = RunConfigModel.build_full_combos(config.input_switch.positions, config.output_switch.positions)
 
     radar = LibreVnaService(serial=config.radar.serial or None)