refactor: introduce PhysicalVolume class and update Geant scene hierarchy to use logical and physical volumes

src/Core/ObjectFactory.h

@@ -71,8 +71,21 @@ public:
 
 
 
-// Object Wrapper
-
+/**
+ * @brief Utility wrapper that bridges factory registration and shared ownership.
+ * 
+ * ObjectWrapper provides a high-level interface to handle objects that can be
+ * both registered in the ObjectFactory and managed through shared ownership
+ * using SmartPointer.
+ * 
+ * One of its key roles is static registration: when instantiated with a 
+ * class name string, it automatically registers a factory function for type T 
+ * in the ObjectFactory singleton. This allows the factory to subsequently 
+ * create instances of T dynamically by name.
+ * 
+ * It supports multiple initialization paths, including factory-based 
+ * construction and direct model wrapping.
+ */
 template <typename T> class ObjectWrapper {
 public:
   ObjectWrapper(const std::string &className) {
@@ -108,7 +121,7 @@ public:
 
   T &operator*() const { return *m_model; }
 
-  T *get() const { return m_model.get(); }
+  T *GetWrapped() const { return m_model.get(); }
 
   bool operator==(const ObjectWrapper &other) const {
     return m_model == other.m_model;