chore: vendor sglang v0.5.10 snapshot

third_party/sglang/scripts/ci/cuda/prepare_runner.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+# Prepare the CI runner by cleaning up stale HuggingFace cache artifacts and validating models
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+echo "Preparing CI runner..."
+echo ""
+
+# Clean up stale HuggingFace cache artifacts from previous failed downloads
+python3 "${SCRIPT_DIR}/../utils/cleanup_hf_cache.py"
+echo ""
+
+# Pre-validate cached models and write markers for offline mode
+# This allows tests to run with HF_HUB_OFFLINE=1 for models that are fully cached
+python3 "${SCRIPT_DIR}/../utils/prevalidate_cached_models.py"
+echo ""
+
+echo "CI runner preparation complete!"