Log the pytorch version.

comfy/model_management.py

@@ -120,6 +120,11 @@ total_vram = get_total_memory(get_torch_device()) / (1024 * 1024)
 total_ram = psutil.virtual_memory().total / (1024 * 1024)
 logging.info("Total VRAM {:0.0f} MB, total RAM {:0.0f} MB".format(total_vram, total_ram))
 
+try:
+    logging.info("pytorch version: {}".format(torch.version.__version__))
+except:
+    pass
+
 try:
     OOM_EXCEPTION = torch.cuda.OutOfMemoryError
 except: