ax(node): rename u to peerURL in Transport.Connect

Single-letter variable name violates AX Principle 1 (predictable names
over short names). peerURL is self-describing without requiring context.

Co-Authored-By: Charon <charon@lethean.io>

pkg/node/transport.go

@@ -319,13 +319,13 @@ func (t *Transport) Connect(peer *Peer) (*PeerConnection, error) {
 	if t.config.TLSCertPath != "" {
 		scheme = "wss"
 	}
-	u := url.URL{Scheme: scheme, Host: peer.Address, Path: t.config.WSPath}
+	peerURL := url.URL{Scheme: scheme, Host: peer.Address, Path: t.config.WSPath}
 
 	// Dial the peer with timeout to prevent hanging on unresponsive peers
 	dialer := websocket.Dialer{
 		HandshakeTimeout: 10 * time.Second,
 	}
-	conn, _, err := dialer.Dial(u.String(), nil)
+	conn, _, err := dialer.Dial(peerURL.String(), nil)
 	if err != nil {
 		return nil, fmt.Errorf("failed to connect to peer: %w", err)
 	}