Latest version of transformers breaks Infinity Server

Nobody has claimed this yet.

### System Info

```
INFO 2025-05-20 20:03:58,938 datasets INFO: PyTorch version config.py:54
2.6.0 available.
Traceback (most recent call last):
File "/app/.venv/bin/infinity_emb", line 4, in
from infinity_emb.cli import cli
File "/app/.venv/lib/python3.12/site-packages/infinity_emb/__init__.py", line 27, in
from infinity_emb.engine import AsyncEmbeddingEngine, AsyncEngineArray # noqa: E402
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/.venv/lib/python3.12/site-packages/infinity_emb/engine.py", line 11, in
from infinity_emb.inference import (
File "/app/.venv/lib/python3.12/site-packages/infinity_emb/inference/__init__.py", line 4, in
from infinity_emb.inference.batch_handler import BatchHandler
File "/app/.venv/lib/python3.12/site-packages/infinity_emb/inference/batch_handler.py", line 39, in
from infinity_emb.transformer.utils import get_lengths_with_tokenize
File "/app/.venv/lib/python3.12/site-packages/infinity_emb/transformer/utils.py", line 9, in
from infinity_emb.transformer.classifier.torch import SentenceClassifier
File "/app/.venv/lib/python3.12/site-packages/infinity_emb/transformer/classifier/torch.py", line 8, in
from infinity_emb.transformer.acceleration import (
File "/app/.venv/lib/python3.12/site-packages/infinity_emb/transformer/acceleration.py", line 11, in
from optimum.bettertransformer import ( # type: ignore[import-untyped]
File "/app/.venv/lib/python3.12/site-packages/optimum/bettertransformer/__init__.py", line 20, in
raise RuntimeError(
RuntimeError: BetterTransformer requires transformers<4.49 but found 4.50.0. `optimum.bettertransformer` is deprecated and will be removed in optimum v2.0.

```

We might need to pin the transformers version or maybe even deprecate the better transformer version

### Information

- [x] Docker + cli
- [ ] pip + cli
- [ ] pip + usage of Python interface

### Tasks

- [x] An officially supported CLI command
- [ ] My own modifications

### Reproduction

uv run infinity_emb v2 --model-id `any-model` --port 8000 --url-prefix /v1

Start by running the reported Docker CLI reproduction: `uv run infinity_emb v2 --model-id any-model --port 8000 --url-prefix /v1`, then inspect the dependency configuration and the `optimum.bettertransformer` import path shown in the traceback. Done means the supported CLI starts without the transformers/BetterTransformer incompatibility, with the chosen dependency or deprecation behavior covered by the project’s relevant checks.

Written by the indexing model from the issue text.