feat(middleware): add RouteTag middleware for enhanced logging and routing

- Introduced RouteTag middleware to set route tags for different API endpoints.
- Updated logger to include route tags in log output.
- Applied RouteTag middleware across various routers including API, dashboard, relay, video, and web routers for consistent logging.

router/video-router.go

@@ -10,12 +10,14 @@ import (
 func SetVideoRouter(router *gin.Engine) {
 	// Video proxy: accepts either session auth (dashboard) or token auth (API clients)
 	videoProxyRouter := router.Group("/v1")
+	videoProxyRouter.Use(middleware.RouteTag("relay"))
 	videoProxyRouter.Use(middleware.TokenOrUserAuth())
 	{
 		videoProxyRouter.GET("/videos/:task_id/content", controller.VideoProxy)
 	}
 
 	videoV1Router := router.Group("/v1")
+	videoV1Router.Use(middleware.RouteTag("relay"))
 	videoV1Router.Use(middleware.TokenAuth(), middleware.Distribute())
 	{
 		videoV1Router.POST("/video/generations", controller.RelayTask)
@@ -30,6 +32,7 @@ func SetVideoRouter(router *gin.Engine) {
 	}
 
 	klingV1Router := router.Group("/kling/v1")
+	klingV1Router.Use(middleware.RouteTag("relay"))
 	klingV1Router.Use(middleware.KlingRequestConvert(), middleware.TokenAuth(), middleware.Distribute())
 	{
 		klingV1Router.POST("/videos/text2video", controller.RelayTask)
@@ -40,6 +43,7 @@ func SetVideoRouter(router *gin.Engine) {
 
 	// Jimeng official API routes - direct mapping to official API format
 	jimengOfficialGroup := router.Group("jimeng")
+	jimengOfficialGroup.Use(middleware.RouteTag("relay"))
 	jimengOfficialGroup.Use(middleware.JimengRequestConvert(), middleware.TokenAuth(), middleware.Distribute())
 	{
 		// Maps to: /?Action=CVSync2AsyncSubmitTask&Version=2022-08-31 and /?Action=CVSync2AsyncGetResult&Version=2022-08-31