Allow getting object storage proxy from reader

source/RobotAPI/libraries/armem_objects/client/instance/ObjectReader.h

@@ -74,6 +74,11 @@ namespace armarx::armem::obj::instance
             return this->p;
         }
 
+        objpose::ObjectPoseStorageInterfacePrx getObjectPoseStorage() const
+        {
+            return objPoseStorage;
+        }
+
     private:
         Properties p;