Update HF Jobs training script

scripts/hf_jobs_train_syllabus.py

@@ -44,8 +44,8 @@ def run(cmd: list[str], *, cwd: Path | None = None) -> None:
 
 
 def uv_run(script_args: list[str], *, cwd: Path) -> None:
-    """Run a repo script with project deps (HF Jobs UV image has no pip module)."""
-    run(["uv", "run", *script_args], cwd=cwd)
+    """Run a repo script using the synced project venv (--extra train)."""
+    run(["uv", "run", "--extra", "train", *script_args], cwd=cwd)
 
 
 def _require_hub_token() -> str:
@@ -71,7 +71,8 @@ def main() -> None:
     if WORK.exists():
         run(["rm", "-rf", str(WORK)])
     run(["git", "clone", "--depth", "1", PIPELINE_GIT, str(WORK)])
-    run(["uv", "pip", "install", "-e", ".[train]"], cwd=WORK)
+    # Create .venv with train extras so `uv run --extra train` sees datasets/trl/torch.
+    run(["uv", "sync", "--extra", "train"], cwd=WORK)
 
     data_dir = WORK / "data" / "finetune"
     data_dir.mkdir(parents=True, exist_ok=True)