feat: VRSub 单体应用(WOV 单机版)初始提交

为视频生成 VR 双眼字幕的单体实现:FastAPI 后端、调度器与全部节点
(提音/转写/翻译/ASS/抽帧/OCR/LLM 过滤)在单进程内运行。

- 节点协议(wov_sdk 数据模型)与分布式版保持一致,预留回退桥梁
- 工作流即数据:DAG 存于 workflows/*.json,模型/链路改动只改数据
- 调度器:拓扑顺序执行、断点续跑(产物重建)、任务暂停/继续
- 抽帧按帧间隔(select 按帧号精确取帧),VLM OCR 与 LLM 过滤使用
  自适应线程池弹性并发,并打印数据处理速度进度日志
- 100% 行覆盖率(pytest --cov-fail-under=100)
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2026-08-16 23:58:25 +08:00
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{
"id": "frame-extract",
"name": "Frame Extract",
"version": "0.1.0",
"capability": "frame-extract",
"repo_dir": "nodes",
"command": ["python", "-m", "frame_extract"],
"env": {},
"input_schema": { "video_uri": "file" },
"output_schema": { "frames_manifest": "file", "frame_count": "integer" },
"max_concurrency": 1,
"idle_ttl_seconds": 300,
"health_timeout_seconds": 10,
"keep_warm": false
}