add support for fx.Proxy

Author: xadupre

onnx_diagnostic/helpers/helper.py

@@ -801,6 +801,9 @@ def _torch_sym_int_to_str(value: "torch.SymInt") -> Union[int, str]:  #  noqa: F
             print(f"[string_type] TT8:{type(obj)}")
         return repr(obj).replace(" ", "").replace("\n", " ")
 
+    if isinstance(obj, torch.fx.proxy.Proxy):
+        return repr(obj)
+
     if ignore:
         if verbose:
             print(f"[string_type] CACHE4:{type(obj)}")