Documents things a future session would otherwise have to rediscover:
no test suite/fixtures exist (verification requires real sample clips
and ffprobe checks), the libvmaf stderr spam is a dev-machine quirk
not a bug, detection thresholds were empirically tuned on one real
dataset, the -r 30 normalization is load-bearing for bitrate targeting
and shouldn't be removed casually, and a cross-platform GUI was
considered and deliberately deferred.
