Bug fixes:
- Bug 1a: source_has_ad flag prevents AI generating AD over existing professional AD;
JobBrief/Job models, gemini service prompt conditional, NewBrief UI checkbox
- Bug 1b: disable native textTracks on video element to prevent double captions
- Bug 2: caption ALL audible speech including off-screen narrators (prompt fix)
- Bug 3: DCMP §6.01 disfluency removal for EN/ES/FR/DE/IT (prompt + post-pass)
- Bug 4: VTT cue settings (line:0%, position:) preserved through parser round-trip
- Bug 5: Whisper word-level timestamp alignment via new caption_aligner service
- Bug 6: assert_cue_alignment used .start/.end; renamed to .start_time/.end_time
- New migration: backfill source_has_ad=False on existing jobs and job_briefs
Also fix retranslation error handling to preserve existing GCS URIs on failure
so video_native captions remain accessible if retranslation fails.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
290d5e32e6