/search and /filter are currently broken
Any search or filter is currently failing.

https://datasets-server.huggingface.co/search?dataset=gsarti%2Fflores_101&config=afr&split=devtest&offset=0&length=100&query=a
https://datasets-server.huggingface.co/filter?dataset=gsarti%2Fflores_101&config=afr&split=devtest&offset=0&length=100&where=id%3E%3D409+and+id%3C511

Logs:

```
FileNotFoundError: [Errno 2] No such file or directory: '/tmp/duckdb-index'
```

when doing `disk_stat = os.statvfs(path)` here: 

https://github.com/huggingface/dataset-viewer/blob/a489c0b6ad4e5a78b2670679abbfab93f9be5742/libs/libapi/src/libapi/duckdb.py#L78
/search and /filter are currently broken: Any search or filter is currently failing.

https://datasets-server.huggingface.co/search?dataset=gsarti%2Fflores_101&config=afr&split=devtest&offset=0&length=100&query=a
https://datasets-server.huggingface.co/filter?dataset=gsarti%2Fflores_101&config=afr&split=devtest&offset=0&length=100&where=id%3E%3D409+and+id%3C511

Logs:

```
FileNotFoundError: [Errno 2] No such file or directory: '/tmp/duckdb-index'
```

when doing `disk_stat = os.statvfs(path)` here: 

https://github.com/huggingface/dataset-viewer/blob/a489c0b6ad4e5a78b2670679abbfab93f9be5742/libs/libapi/src/libapi/duckdb.py#L78