metaatomics tests are failing

[curtischong]

 Downloading h5py
 Downloading tables
      Built torch-sim-atomistic @ file:///home/runner/work/torch-sim/torch-sim
Installed 44 packages in 231ms
Traceback (most recent call last):
  File "/home/runner/work/torch-sim/torch-sim/examples/tutorials/metatomic_tutorial.py", line 31, in <module>
    model = MetatomicModel("pet-mad")
            ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runner/work/_temp/setup-uv-cache/archive-v0/fOuEkIAD-Jgve2fmkD301/lib/python3.11/site-packages/torch_sim/models/metatomic.py", line 107, in __init__
    self._model = load_model(path).export()
                  ^^^^^^^^^^^^^^^^
  File "/home/runner/work/_temp/setup-uv-cache/environments-v2/metatomic-tutorial-26e2987da36d6eac/lib/python3.11/site-packages/metatrain/utils/io.py", line 163, in load_model
    return model_from_checkpoint(path, context="export")
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runner/work/_temp/setup-uv-cache/environments-v2/metatomic-tutorial-26e2987da36d6eac/lib/python3.11/site-packages/metatrain/utils/io.py", line 178, in model_from_checkpoint
    raise ValueError(
ValueError: Checkpoint architecture 'llpr' not found in the available architectures. Available architectures are: ['pet', 'soap_bpnn', 'gap', 'experimental.nanopet', 'deprecated.pet']

I didn't look into the cause too much but I noticed that https://huggingface.co/lab-cosmo/pet-mad/resolve/main/models/pet-mad-latest.ckpt is giving us an "Entry not found" error.

we use that url here: https://github.com/Radical-AI/torch-sim/blob/main/torch_sim/models/metatomic.py#L106