fix(log): use constructor template instead of class template for initiator

- src/libipc/platform/win/get_sa.h:
  * Change from class template to constructor template
  * Keep 'struct initiator' as a regular class (not template)
  * Make constructor a function template: template <typename Logger> initiator(Logger const &log)
  * Instantiate as: static initiator handle(log);
  * This is valid C++ as function templates can be defined inside functions
  * Fixes the issue that class templates cannot be defined inside functions

The constructor template approach allows proper logger passing while
maintaining valid C++ syntax for local struct definitions.

Author: mutouyun

src/libipc/platform/win/get_sa.h

@@ -8,12 +8,12 @@ namespace detail {
 inline LPSECURITY_ATTRIBUTES get_sa() {
     LIBIPC_LOG();
 
-    template <typename Logger>
     struct initiator {
         SECURITY_DESCRIPTOR sd_;
         SECURITY_ATTRIBUTES sa_;
         bool succ_ = false;
 
+        template <typename Logger>
         initiator(Logger const &log) {
             if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
                 log.error("fail InitializeSecurityDescriptor[", static_cast<int>(::GetLastError()), "]");
@@ -30,7 +30,7 @@ inline LPSECURITY_ATTRIBUTES get_sa() {
         }
     };
 
-    static initiator<decltype(log)> handle(log);
+    static initiator handle(log);
     return handle.succ_ ? &handle.sa_ : nullptr;
 }