fix(infra): disable HF Xet to use classic CDN download path

The Xet transfer protocol (hf-xet) hangs behind TLS-inspection proxies
that allow the TCP/TLS handshake to cas-bridge.xethub.hf.co but block the
data transfer, stalling model downloads at startup. Set HF_HUB_DISABLE_XET=1
so huggingface_hub falls back to the classic CDN path.

Author: luannamorim

docker-compose.yml

@@ -8,6 +8,9 @@ services:
     environment:
       - QDRANT_HOST=qdrant
       - QDRANT_API_KEY=${QDRANT_API_KEY:-}
+      # Force HuggingFace's classic CDN download path. The Xet transfer
+      # protocol is blocked/throttled by some corporate TLS-inspection proxies.
+      - HF_HUB_DISABLE_XET=1
     volumes:
       - ./docs:/app/docs
       # Self-contained model cache so `docker compose up` works on any host