e236ec1f42
Two deterministic CI failures from run 115 (PR #34 wiring): mpv-fourier-debian (task 566): dpkg-deb refuses `Conflicts: pkg1 | pkg2` — Debian policy doesn't allow alternatives in Conflicts. Split into separate entries. daedalus-v4l2-debian (task 563): pacman -Syu pulled stock arch ffmpeg which conflicts with the already-installed ffmpeg-v4l2-request-fourier left behind by the earlier mpv-fourier-aarch64 job (it configures [marfrit] + pre-installs the fourier ffmpeg). Drop 'ffmpeg' from the pacman line; mirror the [marfrit]+pre-install step from mpv-fourier-debian. Daedalus only needs libavcodec/libavformat headers which the fourier package supplies.