Live re-run: the per-image systemctl start/stop docker cycles tripped systemd's
start rate limit after three fast pushes — "Start request repeated too
quickly / start-limit-hit" — and the fourth image (the paper base) silently
never reached the registry while the installer aborted. docker.service is
socket-triggered, so every cycle counts against the burst limit twice.
push_images_to_registry now starts docker once for the whole batch and stops it
once at the end; push_image_to_registry itself no longer touches systemd.
bootstrap_test.sh pins the wrap (exactly one start, one stop, four pushes).
Lemon-miaow
c7e585e21d