VLESS practice: Use user-sent VLESS UUID's last byte as vlessRoute for routing rules

https://github.com/XTLS/Xray-core/pull/5009#issuecomment-3194262087

features/routing/context.go

@@ -41,6 +41,9 @@ type Context interface {
 	// GetUser returns the user email from the connection content, if exists.
 	GetUser() string
 
+	// GetVlessRoute returns the user-sent VLESS UUID's last byte, if exists.
+	GetVlessRoute() net.Port
+
 	// GetAttributes returns extra attributes from the conneciont content.
 	GetAttributes() map[string]string