feat(topup-log): add NODE_NAME env var for audit logs

Introduce NODE_NAME environment variable to identify node identity in top-up
audit logs, improving readability over auto-detected container internal IPs
in Docker/K8s deployments. Surface node_name in admin expanded log rows and
add it as a commented example to docker-compose.yml.

docker-compose.yml

@@ -32,6 +32,7 @@ services:
       - TZ=Asia/Shanghai
       - ERROR_LOG_ENABLED=true # 是否启用错误日志记录 (Whether to enable error log recording)
       - BATCH_UPDATE_ENABLED=true  # 是否启用批量更新 (Whether to enable batch update)
+      - NODE_NAME=new-api-node-1  # 节点名称，用于审计日志中标识节点身份；多节点/容器部署时建议设置 (Node name used in audit logs; recommended when running multiple instances or in containers)
 #      - STREAMING_TIMEOUT=300  # 流模式无响应超时时间，单位秒，默认120秒，如果出现空补全可以尝试改为更大值 （Streaming timeout in seconds, default is 120s. Increase if experiencing empty completions）
 #      - SESSION_SECRET=random_string  # 多机部署时设置，必须修改这个随机字符串！！ （multi-node deployment, set this to a random string!!!!!!!）
 #      - SYNC_FREQUENCY=60  # Uncomment if regular database syncing is needed