fix text and arrow format
fix "0 dataset in text format" reported at https://x.com/jedmaczan/status/1809280782588158452

(+ detect arrow format as well)

![image](https://github.com/user-attachments/assets/fa328156-7650-4aa2-a828-41d5ab13c37c)

I'll re-launch the job for text datasets
fix text and arrow format: fix "0 dataset in text format" reported at https://x.com/jedmaczan/status/1809280782588158452

(+ detect arrow format as well)

![image](https://github.com/user-attachments/assets/fa328156-7650-4aa2-a828-41d5ab13c37c)

I'll re-launch the job for text datasets