fix: Error response in rows when cache is failed
Fix for rows issue in https://github.com/huggingface/datasets-server/issues/1661
When cache parquet failed, it returned 404 instead of 500. Now, it returns the detailed error as in /search.

 
fix: Error response in rows when cache is failed: Fix for rows issue in https://github.com/huggingface/datasets-server/issues/1661
When cache parquet failed, it returned 404 instead of 500. Now, it returns the detailed error as in /search.

 