sync: org onboarding, model updates, sandbox cleanup, prompt fixes

fix: route all HF token usage through session.hf_token from OAuth

fix: pass user OAuth token to dataset inspection tool

rewording

v3 prompt and tool desc rework

ruff

small modif

limit in rows displaying

better data shape + small change in tool desc

Fix example message selection and show as JSON with all keys

Prefer tool_calls or assistant message for example structure

Unify dataset tools into single comprehensive hf_inspect_dataset tool

modified timeout and rows parameters

Added 2 dataset tools, one to list rows, the other one to download the dataset