fix AliveMap

[Ahmad10611]

In controller.go, a new function updateUserStatus was added to clean and update the AliveMap for users with changed UUIDs, ensuring the correct handling of online device information.

[wyx2685]

wtf is user.UUIDChanged

[Ahmad10611]

"The UUIDChanged flag was introduced to track when a user's UUID has been modified. This flag isn't part of the original codebase and was added to detect and handle updates to the UUID. If it's not needed or doesn't exist in the current UserInfo structure, an alternative method (like comparing the current and previous UUIDs directly) can be used."

[wyx2685]

it won't pass compile test