Add torch to both venv setup scripts

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

setup-venv-local-build.sh

@@ -57,6 +57,7 @@ fi
 
 echo "==> upgrading pip + build tools"
 "${VENV}/bin/pip" install --upgrade pip wheel setuptools pybind11 --quiet
+"${VENV}/bin/pip" install torch
 
 # --- clone (skipped if already done) ---
 if [ ! -d "${BUILD_DIR}/src/.git" ]; then