Complete orig_timeline set: all 21 test videos rebuilt on original session timeline (drift <10ms), ~10.9h total

Add full-test machine-draft En references (3,908 clips, Qwen3-32B with slide-term context; translation_source=machine_draft, unverified)

Add 16-segment hand-translated En reference demo (KJ talk) as format/quality sample

Add orig_timeline variant (real silence restored) + slide-aware docs; keep silence_removed

Add 3 concatenated long-form zh debug streams from Chinese-LiPS test split

initial commit