ModuleNotFoundError: No module named 'h4'

Hello, I want to load the `training_arg.bin` of [zephyr-7b-beta](https://huggingface.co/HuggingFaceH4/zephyr-7b-beta) and pass it to `DPOTrainer` of `trl` to compute the implicit rewards and logps conveniently, but it seems lack some private modules.

```
import torch
training_args = torch.load("training_args.bin")
```
`ModuleNotFoundError: No module named 'h4'`

Start by reproducing the failure with torch.load("training_args.bin") from the zephyr-7b-beta artifact, then trace how DPOTrainer expects to consume the loaded training arguments. Investigate where the missing private h4 module is referenced and whether the artifact can be loaded through a supported path. Done means the documented loading workflow works without ModuleNotFoundError, or the limitation and workaround are clearly documented.

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