fix(langgraph): compose 显式覆盖 JAVA_CONTEXT_URL 指向宿主机 9082，修复容器内 chat load_context 回调 Java 失败

cfc-langgraph/docker-compose.yml

@@ -30,6 +30,7 @@ services:
       - .env.production
     environment:
       - JAVA_BASE_URL=http://172.17.0.1:9082
+      - JAVA_CONTEXT_URL=http://172.17.0.1:9082/api/ai/context
       - CHROMA_DB_PATH=/data/chroma_db
       - JSON_LOGS=true
       - LANGCHAIN_TRACING_V2=${LANGCHAIN_TRACING_V2:-false}