ocm: Add Responses WebSocket API proxy and fix client config docs

Support the OpenAI Responses WebSocket API (`wss://.../v1/responses`)
for bidirectional frame proxying with usage tracking.
Fix Codex CLI client config examples to use profiles and correct flags.

Update openai-go v3.24.0 → v3.26.0.

service/ocm/service.go

@@ -130,6 +130,7 @@ type Service struct {
 	credentialPath string
 	credentials    *oauthCredentials
 	users          []option.OCMUser
+	dialer         N.Dialer
 	httpClient     *http.Client
 	httpHeaders    http.Header
 	listener       *listener.Listener
@@ -187,6 +188,7 @@ func NewService(ctx context.Context, logger log.ContextLogger, tag string, optio
 		logger:         logger,
 		credentialPath: options.CredentialPath,
 		users:          options.Users,
+		dialer:         serviceDialer,
 		httpClient:     httpClient,
 		httpHeaders:    options.Headers.Build(),
 		listener: listener.New(listener.Options{
@@ -356,6 +358,11 @@ func (s *Service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
+	if strings.EqualFold(r.Header.Get("Upgrade"), "websocket") && strings.HasPrefix(path, "/v1/responses") {
+		s.handleWebSocket(w, r, proxyPath, username)
+		return
+	}
+
 	var requestModel string
 
 	if s.usageTracker != nil && r.Body != nil {