Update promptguard_utils.py #122
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fix(promptguard): add safe device handling and stable model loading
_safe_move_to_deviceto gracefully handle NotImplementedErrorand unexpected errors during
model.to(device)_pick_deviceto prioritize MPS → CUDA → CPUdevice_map=None,low_cpu_mem_usage=False, andtorch_dtype=torch.float32to avoid meta-tensor crashes