feat: add connect error handle to Reconclient

src/recon/RequestResult.h

@@ -6,6 +6,8 @@ class RequestResult
 public:
     static RequestResult Success(const std::string& aMessage= std::string());
     static RequestResult Fail(const std::string& aMessage);
+    static RequestResult ConnectFail(const std::string& aMessage);
+
 
     RequestResult()=default;
     RequestResult(RequestResult &&) = default;
@@ -16,6 +18,7 @@ public:
 
     bool good();
     bool bad();
+    bool isConnectFailure();
     std::string message();
     std::string error();
 
@@ -24,6 +27,7 @@ private:
     std::string mMessage;
     std::string mError;
     bool mSuccess;
+    bool mConnectError;
     void becomeGood(const std::string& aMessage );
     void becomeBad(const std::string& aMessage);