fix: stabilize kafka queue startup

server/internal/library/queue/disk.go

@@ -125,7 +125,7 @@ func (d *DiskProducerMq) getProducer(topic string) *disk.Queue {
 
 func NewDiskQueue(topic string, config *disk.Config) *disk.Queue {
 	conf := &disk.Config{
-		Path:         fmt.Sprintf(config.Path + "/" + config.GroupName + "/" + topic),
+		Path:         fmt.Sprintf("%s/%s/%s", config.Path, config.GroupName, topic),
 		BatchSize:    config.BatchSize,
 		BatchTime:    config.BatchTime * time.Second,
 		SegmentSize:  config.SegmentSize,