[Bug]: Chatbot throws an error

### What happened?

In [dev environnement](https://planifets.dev.cedille.club/planner), we're not able to use the chatbot. Probably has to do with the recent changes in the new [k8 repo](https://github.com/ClubCedille/k8s-shared/tree/main/apps/clubs/applets). Need to add write permission to the folder that needs to be created (`mkdir '/transformers-cache/Xenova'`).

Logs :
```
event: status
id: 1
data: SEARCHING_EMBEDDINGS

event: error
id: 2
data: Error: EACCES: permission denied, mkdir '/transformers-cache/Xenova'
data: at async Object.mkdir (node:internal/fs/promises:858:10)
data: at async FileCache.put (/app/node_modules/@huggingface/transformers/dist/transformers.node.cjs:6850:7)
data: at async storeCachedResource (/app/node_modules/@huggingface/transformers/dist/transformers.node.cjs:7503:5)
data: at async loadResourceFile (/app/node_modules/@huggingface/transformers/dist/transformers.node.cjs:7642:5)
data: at async getModelFile (/app/node_modules/@huggingface/transformers/dist/transformers.node.cjs:7713:10)
data: at async getCoreModelFile (/app/node_modules/@huggingface/transformers/dist/transformers.node.cjs:23291:10)
data: at async getSession (/app/node_modules/@huggingface/transformers/dist/transformers.node.cjs:23399:26)
data: at async /app/node_modules/@huggingface/transformers/dist/transformers.node.cjs:23411:69
data: at async Promise.all (index 0)
data: at async constructSessions (/app/node_modules/@huggingface/transformers/dist/transformers.node.cjs:23408:5)

```

### What is the expected behavior?

Chatbot should respond with recommended courses.

### Steps to reproduce

1. Send message in chatbot
2. stream endpoint doesnt work because of issue with write permission in cluster

### Screenshots and additional context

_No response_

Start with the chatbot stream endpoint in this repository and reproduce the EACCES failure using the log's /transformers-cache/Xenova path. Then inspect apps/clubs/applets in the linked ClubCedille/k8s-shared repository, where the deployment configuration is located. Done means the development chatbot responds with recommended courses without a permission error.

Written by the indexing model from the issue text.