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.

common/constants.go

@@ -116,6 +116,10 @@ var RetryTimes = 0
 
 var IsMasterNode bool
 
+// NodeName 节点名称，从 NODE_NAME 环境变量读取；
+// 用于审计日志中标识节点身份，在容器/K8s 部署时比自动探测到的容器内网 IP 更具可读性。
+var NodeName = ""
+
 var requestInterval int
 var RequestInterval time.Duration
 

common/init.go

@@ -82,6 +82,7 @@ func InitEnv() {
 	DebugEnabled = os.Getenv("DEBUG") == "true"
 	MemoryCacheEnabled = os.Getenv("MEMORY_CACHE_ENABLED") == "true"
 	IsMasterNode = os.Getenv("NODE_TYPE") != "slave"
+	NodeName = os.Getenv("NODE_NAME")
 	TLSInsecureSkipVerify = GetEnvOrDefaultBool("TLS_INSECURE_SKIP_VERIFY", false)
 	if TLSInsecureSkipVerify {
 		if tr, ok := http.DefaultTransport.(*http.Transport); ok && tr != nil {