feat(controlled): 实现设备激活与安全认证流程

- 添加API客户端、加密存储和provision/token激活逻辑
- WebSocket改用Bearer令牌认证，移除REGISTER请求
- 设备ID改为服务端下发，支持令牌刷新和强制下线处理
- 新增deviceSecret加密存储和accessToken自动刷新
- 更新设备ID获取方式为出厂SN，添加安全存储依赖

webrtc_controller_flutter/macos/Flutter/GeneratedPluginRegistrant.swift

@@ -6,9 +6,11 @@ import FlutterMacOS
 import Foundation
 
 import device_info_plus
+import flutter_secure_storage_macos
 import flutter_webrtc
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   DeviceInfoPlusMacosPlugin.register(with: registry.registrar(forPlugin: "DeviceInfoPlusMacosPlugin"))
+  FlutterSecureStoragePlugin.register(with: registry.registrar(forPlugin: "FlutterSecureStoragePlugin"))
   FlutterWebRTCPlugin.register(with: registry.registrar(forPlugin: "FlutterWebRTCPlugin"))
 }