修复：为 user-svc 添加健康检查和启动顺序控制

backend/gateway/internal/service/user_service.go

@@ -3,14 +3,14 @@ package service
 import (
 	"context"
 
-	"backend/gateway/internal/config"
-	"backend/shared/pkg/logger"
+	"gateway/internal/config"
+	"shared/pkg/logger"
 
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
 
 	// 导入生成的 proto 代码
-	userpb "backend/services/user-svc/proto"
+	userpb "shared/proto/user"
 )
 
 type UserService struct {