Native node CUDA Docker: nvidia/cuda base + GPU runtime

Dockerfile käyttää nvidia/cuda:12.6.3 -imagea jossa CUDA-kirjastot
ovat valmiina. docker-compose lisää runtime: nvidia + NVIDIA_VISIBLE_DEVICES.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

network-poc/docker-compose.yml

@@ -17,12 +17,13 @@ services:
       context: .
       dockerfile: Dockerfile.native-node
     container_name: kipina_native_node
+    runtime: nvidia
     environment:
       - HUB_URL=ws://agentic-poc:3000/ws
       - ALLOCATED_GB=4
+      - NVIDIA_VISIBLE_DEVICES=all
     depends_on:
       - agentic-poc
-    # GPU passthrough (valinnainen — toimii myös ilman)
     deploy:
       resources:
         reservations: