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- Celery 异步任务：任务提交后后端持续轮询火山 API 直到拿到终态，用户关浏览器也不会丢视频 - 渐进式轮询：前2分钟每5秒、2-10分钟每15秒、10分钟后每30秒 - 优雅降级：无 Redis 时静默跳过，不影响现有前端轮询 - K8s：新增 Redis Deployment + Service、Celery Worker Deployment - CI/CD：deploy.yaml 自动部署 Redis/Celery，每次推代码自动重启 celery worker - 兜底：poll_stuck_tasks management command 清理僵尸任务 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>