A hung git/make/gh/clone would block the CEO-gated release loop
indefinitely. Wrap each proc.communicate() in asyncio.wait_for via a
shared _await_proc helper; on expiry proc.kill() the child and return a
non-zero rc (124) so every caller's fail-closed branch fires. Mirrors the
quality-gate _run_one kill-on-timeout idiom.
Deadlines are generous (30min gate / 10min clone / 5min push+gh) so a
legitimate slow op is never wrongly aborted — floor-assertion tests pin
the floors to guard exactly that logical regression. Green path returns
the real rc unchanged.
