Backup Always Right

Bug Fixes:

Fixed ThreadPoolExecutor rejected error after /bar reload → /bar start

Fixed missing multiBackup translation keys (no more raw key display)

Fixed wrong translation key for multiBackup status in reload output Improvements:

Added multiBackup status to /bar status 修复:

修复 /bar reload 后 /bar start 报 ThreadPoolExecutor rejected 错误

修复多线程备份相关翻译缺失（不再显示原始 key）

修复 reload 输出中 multiBackup 状态使用错误翻译键 优化:

/bar status 新增多线程备份状态显示