[idd] common: use CSRWLock throughout the drivers

Make CSRWLock own the native lock and provide scoped guards for shared,
exclusive, early-unlock, and non-blocking use.

Replace direct SRW lock management throughout the IDD, input driver,
and helper while preserving the existing lock scopes.

idd/LGCommon/CPipeEndpoint.h

@@ -20,6 +20,8 @@
 
 #pragma once
 
+#include "CSRWLock.h"
+
 #include <Windows.h>
 
 #include <atomic>
@@ -124,7 +126,7 @@ private:
   std::atomic<bool> m_running { false };
   std::atomic<bool> m_connected { false };
 
-  SRWLOCK m_pipeLock = SRWLOCK_INIT;
+  CSRWLock m_pipeLock;
   HANDLE m_pipe = INVALID_HANDLE_VALUE;
   HANDLE m_thread = nullptr;
   HANDLE m_stopEvent = nullptr;