Unify accept and network threads into io threads

src/connection.hpp

@@ -21,12 +21,13 @@ extern std::atomic<int> activeConnections;
  * Represents a single client connection with efficient memory management.
  *
  * Connection ownership model:
- * - Created by accept thread, transferred to epoll via raw pointer
- * - Network threads claim ownership by wrapping raw pointer in unique_ptr
- * - Network thread optionally passes ownership to a thread pipeline
+ * - Created by I/O thread, processed immediately, then transferred to epoll via
+ * raw pointer
+ * - I/O threads claim ownership by wrapping raw pointer in unique_ptr
+ * - I/O thread optionally passes ownership to a thread pipeline
  * - Owner eventually transfers back to epoll by releasing unique_ptr to raw
  * pointer
- * - RAII cleanup happens if network thread doesn't transfer back
+ * - RAII cleanup happens if I/O thread doesn't transfer back
  *
  * Arena allocator thread safety:
  * Each Connection contains its own ArenaAllocator instance that is accessed
@@ -68,7 +69,7 @@ struct Connection {
    * @brief Queue a message to be sent to the client.
    *
    * Adds data to the connection's outgoing message queue. The data will be sent
-   * asynchronously by the server's network threads using efficient vectored
+   * asynchronously by the server's I/O threads using efficient vectored
    * I/O.
    *
    * @param s The data to send (string view for zero-copy efficiency)
@@ -342,7 +343,7 @@ private:
    * @return std::unique_ptr<Connection> to the newly created connection
    *
    * @note This method is only accessible to the Server class and should be used
-   * exclusively by accept threads when new connections arrive.
+   * exclusively by I/O threads when new connections arrive.
    */
   static std::unique_ptr<Connection>
   createForServer(struct sockaddr_storage addr, int fd, int64_t id,