matryoshka_dim=512 is not in a valid range. Select between 1 and 128.

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### System Info

curl -X 'POST' 'https://localhost:8080/embeddings' -H 'accept: application/json' -H 'Content-Type: application/json' -d '{
"model": "mixedbread-ai/mxbai-embed-large-v1",
"encoding_format": "float",
"dimensions": 512,
"input": [
"test 123"
],
"modality": "text"
}'
{
"error": {
"message": " -> matryoshka_dim=512 is not in a valid range. Select between 1 and 128.",
"type": null,
"param": null,
"code": 400
}
}

### Information

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

### Tasks

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

### Reproduction

1. Start michaelf34/infinity:latest using: v2 --model-id mixedbread-ai/mxbai-embed-large-v1 --port 8080 --embedding-dtype ubinary
2. Query embeddings API endpoint.

Reproduce the failure using the documented Docker CLI command and the POST /embeddings request with mixedbread-ai/mxbai-embed-large-v1, dimensions=512, and embedding-dtype ubinary. Trace the MatryoshkaDimError handling to determine the intended valid dimension range, then verify that the API responds correctly for the supported configuration.

Written by the indexing model from the issue text.