feat(place/attendee_scanner): less redirection

when obtaining the list of systems (go direct to the source)

drivers/place/attendee_scanner.cr

@@ -24,15 +24,15 @@ class Place::AttendeeScanner < PlaceOS::Driver
     @org_id = nil
   end
 
-  # Grabs the list of systems in the building
-  getter systems : Hash(String, Array(String)) do
-    locations.systems.get.as_h.transform_values(&.as_a.map(&.as_s))
-  end
-
   getter building_id : String do
     locations.building_id.get.as_s
   end
 
+  # Grabs the list of systems in the building
+  getter systems : Hash(String, Array(String)) do
+    staff_api.systems_in_building(building_id).get.as_h.transform_values(&.as_a.map(&.as_s))
+  end
+
   getter org_id : String do
     building_details = staff_api.zone(building_id).get