upgrade asio from 1.29.0 to 1.38.0 (#827)

Migrate removed deprecated APIs:
- io_service -> io_context
- io_service::work -> executor_work_guard
- resolver::query/iterator -> resolver::resolve() with results_type
- address::from_string() -> make_address()

---

Breaking Changes (1.33.0)
  - deferred as default completion token — can omit token in coroutines: co_await socket.async_read_some(buf)
  - cancel_after / cancel_at — timeout any async operation: co_await sock.async_read_some(buf, cancel_after(5s))
  - Partial completion token adapters — as_tuple, redirect_error, bind_executor etc. composable via pipe: co_await (async_write(sock, buf) | as_tuple | cancel_after(10s))
  - composed — simpler alternative to async_compose for stateful operation implementations
  - co_composed moved out of experimental

  1.35.0 — Allocator & Resolver
  - Allocator constructors for io_context and thread_pool — control memory allocation for services, I/O objects, strands
  - Configurable resolver thread pool ("resolver"/"threads")
  - Timer heap pre-allocation ("timer"/"heap_reserve")

  1.37.0 — Inline Executors & Reactor Tuning
  - inline_executor — always executes inline (useful as completion executor)
  - inline_or_executor<> — tries inline first, falls back to wrapped executor
  - New dispatch/post/defer overloads that run a function on one executor and deliver result to a handler on another
  - redirect_disposition — captures disposition into a variable (like redirect_error but generic)
  - Reactor config: reset_edge_on_partial_read, use_eventfd, use_timerfd

  Notable Fixes

  - Resource leak in awaitable move assignment (1.37.0)
  - Memory leak in SSL stream move assignment (1.37.0)
  - Thread sanitizer issue in kqueue reactor (1.37.0)
  - co_spawn non-reentrant completion handler fix (1.36.0)
  - Windows file append mode fix (1.32.0)
  - SSL engine move assignment leak (1.33.0)

1 files changed, 6 insertions, 6 deletions

diff --git a/src/zenhttp/clients/httpwsclient.cpp b/src/zenhttp/clients/httpwsclient.cpp
index 792848a6b..2d566ae86 100644
--- a/src/zenhttp/clients/httpwsclient.cpp
+++ b/src/zenhttp/clients/httpwsclient.cpp
@@ -125,8 +125,8 @@ struct HttpWsClient::Impl
 	{
 		if (m_OwnedIoContext)
 		{
-			m_WorkGuard = std::make_unique<asio::io_context::work>(m_IoContext);
-			m_IoThread	= std::thread([this] { m_IoContext.run(); });
+			m_WorkGuard.emplace(m_IoContext.get_executor());
+			m_IoThread = std::thread([this] { m_IoContext.run(); });
 		}
 
 #if defined(ASIO_HAS_LOCAL_SOCKETS)
@@ -564,10 +564,10 @@ struct HttpWsClient::Impl
 	std::string m_Path;
 
 	// io_context: owned (standalone) or external (shared)
-	std::unique_ptr<asio::io_context>		m_OwnedIoContext;
-	asio::io_context&						m_IoContext;
-	std::unique_ptr<asio::io_context::work> m_WorkGuard;
-	std::thread								m_IoThread;
+	std::unique_ptr<asio::io_context>										  m_OwnedIoContext;
+	asio::io_context&														  m_IoContext;
+	std::optional<asio::executor_work_guard<asio::io_context::executor_type>> m_WorkGuard;
+	std::thread																  m_IoThread;
 
 	// Connection state
 	std::unique_ptr<asio::ip::tcp::resolver> m_Resolver;