feat(server-go): 微信订阅消息骨架（#11，绑定/订阅/巡检触发，配置占位）

server-go/internal/config/config.go

@@ -25,6 +25,10 @@ type Config struct {
 	ZLMSecret            string `env:"ZLM_SECRET" envDefault:"su6TiedN2rVAmBbIDX0aa0QTiBJLBdcf"`
 	RecorderAPIBase      string `env:"RECORDER_API_BASE" envDefault:"http://localhost:9090"`
 	AIServiceBase        string `env:"AI_SERVICE_BASE" envDefault:"http://localhost:8000"`
+	WechatAppID          string `env:"WECHAT_APPID" envDefault:""`
+	WechatSecret         string `env:"WECHAT_SECRET" envDefault:""`
+	WechatTemplateAlarm  string `env:"WECHAT_TEMPLATE_ALARM" envDefault:""`
+	WechatTemplateInspection string `env:"WECHAT_TEMPLATE_INSPECTION" envDefault:""`
 	InternalAPIKey       string `env:"INTERNAL_API_KEY" envDefault:"silk-internal-2026"`
 	Port                 int    `env:"PORT" envDefault:"3000"`
 	DefaultAdminUsername string `env:"DEFAULT_ADMIN_USERNAME" envDefault:"admin"`