lavalink/plugins/youtube-plugin-1.18.2.jar never reached the repo - the '*.jar' ignore rule silently dropped it from git add. Add an exception and force-add the jar so Lavalink actually loads the YouTube source.
- jar in plugins/ + dependency line in application.yml both bumped - lavasrc-plugin 4.8.3 already latest (Lavalink v4 compatible) - lavalink image 4-alpine already tracks latest 4.2.2 (moving tag)
