feat: add prepared write - #574

websocket.handshakeRequest calls http.Client.Do, which eventually calls tls.Dialer.DialContext

websocket.Conn.writeFrame calls bufio.Writer.Flush, which calls tls.Conn.Write

websocket.limitReader.Read calls bufio.Reader.Read, which calls tls.Conn.Read

websocket.handshakeRequest calls http.Client.Do, which eventually calls tls.Conn.HandshakeContext

websocket.PreparedMessage.compress calls sync.Once.Do, which eventually calls asn1.Unmarshal

websocket.handshakeRequest calls http.Client.Do, which eventually calls tls.Dialer.DialContext

websocket.Conn.writeFrame calls bufio.Writer.Flush, which calls tls.Conn.Write

websocket.limitReader.Read calls bufio.Reader.Read, which calls tls.Conn.Read

websocket.handshakeRequest calls http.Client.Do, which eventually calls tls.Conn.HandshakeContext

websocket.handshakeRequest calls http.Client.Do, which eventually calls url.URL.Parse

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-go@v5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/