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/tagwriter/tagwriter.go

@@ -99,6 +99,7 @@ func asBytes(v any) ([]byte, bool) {
 	}
 
 	out := make([]byte, len(arr))
+
 	for i, elem := range arr {
 		f, ok := elem.(float64)
 		if !ok {