Use specific exception types in CUDA version parse

Per AGENTS.md: prefer specific exception types in new code. AttributeError
covers torch.version.cuda being None, ValueError covers an unparseable
version string.

comfy/model_management.py

@@ -1966,7 +1966,7 @@ def supports_nvfp4_compute(device=None):
     # cuBLAS FP4 matmul kernels require CUDA 13+, see #11864
     try:
         cuda_version_major = int(torch.version.cuda.split(".")[0])
-    except:
+    except (AttributeError, ValueError):
         return False
     if cuda_version_major < 13:
         return False