cubec forwarded its OWN leading options (--socket/--tenant/...) verbatim
into the command payload sent to the daemon, so 'cubec --socket SOCK
"prog ..."' made the server reject '--socket' as an unknown command.
stress.sh therefore produced 'error: unknown command: --socket' on every
sample and measured nothing.
Split cubec arg parsing into client-option vs command-payload so flags are
consumed locally and only the command reaches the daemon. The canonical
'./check stress' stage now drives a real daemon and samples stats.
CUBELinux-2
4ab938fde8