refactor(Core/Misc): string handling and use smart pointer for strand (#22351)

src/common/Logging/Log.h

@@ -24,6 +24,7 @@
 #include "StringFormat.h"
 #include <unordered_map>
 #include <vector>
+#include <memory>
 
 class Appender;
 class Logger;
@@ -120,7 +121,7 @@ private:
     std::string m_logsTimestamp;
 
     Acore::Asio::IoContext* _ioContext;
-    Acore::Asio::Strand* _strand;
+    std::unique_ptr<Acore::Asio::Strand> _strand;
 };
 
 #define sLog Log::instance()