enrich-formula Exception: data did not match any variant of untagged enum ModelWrapper

### Bug
https://www.mdpi.com/1099-4300/21/1/3

[entropy-1.pdf](https://github.com/user-attachments/files/20514663/entropy-1.pdf)

I try to convert the pdf of this paper into md. But docling output `` in normal mode. When I added the `--enrich-formula` flag, it gives the following error:

docling --enrich-formula entropy-1.pdf

> Traceback (most recent call last):
> File "/Users/bwen/.pyenv/versions/3.11.1/bin/docling", line 8, in
> sys.exit(app())
> ^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/typer/main.py", line 338, in __call__
> raise e
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/typer/main.py", line 321, in __call__
> return get_command(self)(*args, **kwargs)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/click/core.py", line 1157, in __call__
> return self.main(*args, **kwargs)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/typer/core.py", line 665, in main
> return _main(
> ^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/typer/core.py", line 197, in _main
> rv = self.invoke(ctx)
> ^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/click/core.py", line 1434, in invoke
> return ctx.invoke(self.callback, **ctx.params)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/click/core.py", line 783, in invoke
> return __callback(*args, **kwargs)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/typer/main.py", line 703, in wrapper
> return callback(**use_params)
> ^^^^^^^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/docling/cli/main.py", line 593, in convert
> export_documents(
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/docling/cli/main.py", line 167, in export_documents
> for conv_res in conv_results:
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/docling/document_converter.py", line 243, in convert_all
> for conv_res in conv_res_iter:
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/docling/document_converter.py", line 278, in _convert
> for item in map(
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/docling/document_converter.py", line 324, in _process_document
> conv_res = self._execute_pipeline(in_doc, raises_on_error=raises_on_error)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/docling/document_converter.py", line 345, in _execute_pipeline
> pipeline = self._get_pipeline(in_doc.format)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/docling/document_converter.py", line 307, in _get_pipeline
> self.initialized_pipelines[cache_key] = pipeline_class(
> ^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/docling/pipeline/standard_pdf_pipeline.py", line 106, in __init__
> CodeFormulaModel(
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/docling/models/code_formula_model.py", line 107, in __init__
> self.code_formula_model = CodeFormulaPredictor(
> ^^^^^^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/docling_ibm_models/code_formula_model/code_formula_predictor.py", line 83, in __init__
> self._tokenizer = AutoTokenizer.from_pretrained(
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/transformers/models/auto/tokenization_auto.py", line 889, in from_pretrained
> return tokenizer_class.from_pretrained(pretrained_model_name_or_path, *inputs, **kwargs)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/transformers/tokenization_utils_base.py", line 2163, in from_pretrained
> return cls._from_pretrained(
> ^^^^^^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/transformers/tokenization_utils_base.py", line 2397, in _from_pretrained
> tokenizer = cls(*init_inputs, **init_kwargs)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/transformers/models/gpt2/tokenization_gpt2_fast.py", line 99, in __init__
> super().__init__(
> File "/Users/bwen/.pyenv/versions/3.11.1/lib/python3.11/site-packages/transformers/tokenization_utils_fast.py", line 115, in __init__
> fast_tokenizer = TokenizerFast.from_file(fast_tokenizer_file)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Exception: data did not match any variant of untagged enum ModelWrapper at line 255422 column 3

### Steps to reproduce
run `docling --enrich-formula entropy-1.pdf`

### Docling version
Docling version: 2.30.0
Docling Core version: 2.27.0
Docling IBM Models version: 3.4.1
Docling Parse version: 4.0.1
Python: cpython-311 (3.11.1)
Platform: macOS-15.5-x86_64-i386-64bit