- Windows: the first test executable died with STATUS_DLL_NOT_FOUND
(0xc0000135) because vcpkg's x64-windows DLLs (ffmpeg and its codecs)
were not on PATH; add vcpkg_installed/x64-windows/bin in the configure
step.
- openKylin: failure_paths_report_cleanly asserts that a read-only library
write fails, but the container runs as root, which bypasses the file
permission bits (CAP_DAC_OVERRIDE) and the write succeeds; skip that
sub-check when euid is 0 (read from /proc/self/status on Linux) and note
it in the log.