Introduced autoplay functionality to keep music playing when the queue ends. Added new `/autoplay` API endpoints, command handling, and service implementations. Enhanced `TrackScheduler`, queue operations, and testing to support autoplay behavior. Integrated YouTube radio mix as the initial provider.
Replaced the bot's audio handling system by removing Lavaplayer dependencies and migrating to a Lavalink v4 node. Updated `MusicManager`, `TrackScheduler`, and related classes to utilize the `LavalinkClient`. Refactored playlist and track loading logic, task integrations, and event dispatch to integrate with the remote node. Deprecated the custom Udio source, preserving references for a future plugin port. Documented configuration and deployment details for the new audio architecture.
anthorob