fix(ci): point libero config to bundled package init_files

The config was pointing to /tmp/libero_init which doesn't exist.
Use importlib.util.find_spec to locate the hf-libero package directory
and write paths to the actual bundled bddl_files/init_files/assets.

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

docker/Dockerfile.benchmark.libero

@@ -67,11 +67,15 @@ COPY --chown=user_lerobot:user_lerobot src/ src/
 
 RUN uv sync --locked --extra libero --no-cache
 
-# Pre-create libero's config file so it never prompts for a dataset path at runtime.
+# Pre-create libero's config file pointing to the bundled package assets.
 # libero/libero/__init__.py calls input() when ~/.libero/config.yaml is missing.
-# Any valid YAML satisfies the existence check; actual paths only matter for dataset loading.
-RUN mkdir -p /home/user_lerobot/.libero && \
-    printf 'assets: /tmp/libero_assets\nbddl_files: /tmp/libero_bddl\ndatasets: /tmp/libero_datasets\ninit_states: /tmp/libero_init\n' \
+# We use importlib.util.find_spec (does NOT execute libero, so no prompt) to locate
+# the package, then write the config to the correct bundled paths.
+RUN LIBERO_DIR=$(python${PYTHON_VERSION} -c \
+      "import importlib.util, os; s=importlib.util.find_spec('libero'); \
+       print(os.path.join(os.path.dirname(s.origin), 'libero'))") && \
+    mkdir -p /home/user_lerobot/.libero && \
+    printf "assets: ${LIBERO_DIR}/assets\nbddl_files: ${LIBERO_DIR}/bddl_files\ndatasets: ${LIBERO_DIR}/../datasets\ninit_states: ${LIBERO_DIR}/init_files\n" \
     > /home/user_lerobot/.libero/config.yaml
 
 RUN chmod +x /lerobot/.venv/lib/python${PYTHON_VERSION}/site-packages/triton/backends/nvidia/bin/ptxas