Since #2604 a picked numbered still imports as itself unless the import
asks for a sequence, as in After Effects. The compositing and tracking QA
scenarios import a PNG run, so they pass `sequence: true`; docs/agents.md
describes the new default.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Bump the FilmCraft crates from 89cfbf2 to 2c5ba7a (118 commits; no API
changes needed here), whose Matroska reader now decodes the VP9 alpha
stream from BlockAdditions. The compositing QA scenario now checks that
WebM renders round-trip their alpha like ProRes 4444.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>