Unify accept and network threads into io threads

src/server.hpp

@@ -105,21 +105,18 @@ private:
   // Shutdown coordination
   int shutdown_pipe_[2] = {-1, -1};
 
-  // Epoll file descriptors
-  int network_epollfd_ = -1;
-  int accept_epollfd_ = -1;
+  // Epoll file descriptor
+  int epollfd_ = -1;
   int listen_sockfd_ = -1;
 
   // Private helper methods
   void setup_shutdown_pipe();
   void setup_signal_handling();
   int create_listen_socket();
-  void start_network_threads();
-  void start_accept_threads();
+  void start_io_threads();
   void cleanup_resources();
 
-  // Helper for processing connection I/O (shared between accept and network
-  // threads)
+  // Helper for processing connection I/O
   bool process_connection_io(std::unique_ptr<Connection> &conn, int events);
 
   /**