add tool。

Base/DataStructure.h

@@ -13,6 +13,15 @@ struct VisitorStats {
     int64_t lastViewTime = 0;
 };
 
+struct VisitRecord {
+    int id;
+    std::string url;
+    std::string visitorUuid;
+    std::string lastUserAgent;
+    int lastViewTime;
+    int pageViewCount;
+};
+
 struct SiteStats {
     int totalViews = 0;
     int totalVisitors = 0;