feat(tensor): add memory destruction check mechanism during tensor destruction

- Added a mechanism to check if the memory has been destroyed during tensor destruction.
- This mechanism prevents repeated memory destruction, enhancing memory management reliability.
- Ensures that memory resources are properly handled and reduces the risk of memory - related errors.

Author: Mgepahmge

src/Tensor.cu

@@ -208,9 +208,15 @@ namespace nz::data {
     }
 
     Tensor::~Tensor() noexcept(false) {
-        cuStrm::StreamManager<value_type>::Instance().free(_data);
+        if (_data != nullptr) {
+            cuStrm::StreamManager<value_type>::Instance().freeAsync(_data);
+            _data = nullptr;
+        }
         if (_requires_grad) {
-            cuStrm::StreamManager<value_type>::Instance().free(_grad);
+            if (_grad != nullptr) {
+                cuStrm::StreamManager<value_type>::Instance().freeAsync(_grad);
+                _grad = nullptr;
+            }
         }
     }