Three independent failures from the last run:
- Linux undefined `vaMapBuffer2`: the runner had apt libva 2.20 while
vcpkg builds shared libva 2.24.1, and the loader had no path to it.
Drop the apt libva packages and put `$prefix/lib` on LD_LIBRARY_PATH
for the Linux and openKylin jobs.
- openKylin "render manager failed to start": a container's /dev/shm is
64 MiB, but the process pool reserves >64 MiB per worker with
posix_fallocate, so segment creation fails. Run the container with
`--shm-size=2g`.
- macOS "no decoder for codec PNG": the vcpkg ffmpeg manifest never
enabled the `png` feature the oak-cli transcode tests need. Add it.
- Windows dependency install took 41 minutes: it was rebuilding FFmpeg
and every codec port from source because the binary archive cache was
never saved. The combined `actions/cache` step with the deprecated
`save-always: true` does not save after a failed job, and the previous
run failed in Build. Replace it in all four jobs with an explicit
restore + `actions/cache/save (if: always() && cache-hit != 'true')`.
Mike-Solar
794850daf6