jfjoch: exception catching.

src/aare/devices/jfjoch.py

@@ -238,12 +238,34 @@ class JFJochWrapper:
             )
 
     def detector(self) -> jfjoch_client.models.DetectorListElement:
-        l = self.__api.config_select_detector_get()
+        try:
+            l = self.__api.config_select_detector_get()
+        except Exception as e:
+            self._raise_jfjoch_error(
+                f"JFJoch detector configuration retrieval failed: {e}",
+                error=e,
+                operation="GET",
+                endpoint="config_select_detector_get",
+            )
 
         if len(l.detectors) == 0:
-            raise Exception("no detectors configured")
+            raise JFJochCommunicationError(
+                "JFJoch returned no configured detectors",
+                operation="GET",
+                endpoint="config_select_detector_get",
+                base_url=self.__url,
+                status_code=None,
+            )
 
-        return l.detectors[l.current_id]
+        try:
+            return l.detectors[l.current_id]
+        except Exception as e:
+            self._raise_jfjoch_error(
+                "JFJoch returned an invalid selected detector entry",
+                error=e,
+                operation="GET",
+                endpoint="config_select_detector_get",
+            )
 
     def get_diffraction_image(self, image_id: int, wait_between_retries_s: float = 0.1):
         last_error = None