fix(S21/T01): fix all lint warnings and upgrade wsl to wsl_v5

Files:
- .golangci.yml
- backend/events/cmd/genevents/main.go
- backend/fileutil/atomicwrite_test.go
- backend/library/library.go
- backend/player/buffered_streamer_test.go
- backend/player/player.go
- backend/tagwriter/dbsync.go
- backend/tagwriter/mp3_test.go
- backend/tagwriter/ogg.go
- backend/tagwriter/ogg_test.go
- backend/tagwriter/ogg_vorbis.go
- backend/tagwriter/pipeline.go
- backend/tagwriter/tagwriter.go
- backend/tagwriter/wav_test.go

backend/events/cmd/genevents/main.go

@@ -20,6 +20,7 @@ import (
 func main() {
 	source := flag.String("source", "events.go", "path to Go events source file")
 	output := flag.String("output", "", "path to TypeScript output file (stdout if empty)")
+
 	flag.Parse()
 
 	consts, err := parseEvents(*source)