chore: add langgraph-server to docker-compose (ARM64 verified)

langchain/langgraph-api:3.11 pulls and runs on ARM64.
Uses SQLite for local state management.

docker-compose.yml

@@ -34,6 +34,21 @@ services:
     depends_on:
       - docker-socket-proxy
 
+  langgraph-server:
+    image: langchain/langgraph-api:3.11
+    environment:
+      - DATABASE_URI=sqlite:///data/langgraph.db
+    volumes:
+      - langgraph-data:/data
+    networks:
+      - galaxis-net
+    restart: unless-stopped
+    deploy:
+      resources:
+        limits:
+          cpus: "0.5"
+          memory: 1G
+
 networks:
   galaxis-net:
     external: true
@@ -42,3 +57,4 @@ volumes:
   uv-cache:
   npm-cache:
   agent-data:
+  langgraph-data: