feat(relay): Add pass-through request option for global settings

setting/model_setting/global.go

@@ -0,0 +1,26 @@
+package model_setting
+
+import (
+	"one-api/setting/config"
+)
+
+type GlobalSettings struct {
+	PassThroughRequestEnabled bool `json:"pass_through_request_enabled"`
+}
+
+// 默认配置
+var defaultOpenaiSettings = GlobalSettings{
+	PassThroughRequestEnabled: false,
+}
+
+// 全局实例
+var globalSettings = defaultOpenaiSettings
+
+func init() {
+	// 注册到全局配置管理器
+	config.GlobalConfig.Register("global", &globalSettings)
+}
+
+func GetGlobalSettings() *GlobalSettings {
+	return &globalSettings
+}