1. Cutter-report source clip for multi-segment beats was using only the
primary in/out, which equals the FIRST segment's range. Beat 10 with
3 shots therefore showed only ~0.88 s of source instead of all 3.32 s.
Added extract_concat_clip(): renders each segment as its own MP4 and
concatenates them via ffmpeg's concat demuxer into one continuous
source clip the same length as the trailer beat.
Per-segment intermediate clips (beat_NN_source_seg00.mp4 etc.) are
kept too so individual shots stay inspectable.
2. _regenerate_cutter_report now also regenerates the legacy
output/report/match_report.html via src.pipeline.reporter.generate_report.
Both reports stay in sync after every match command.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Melbar