When the task processor service is down the rootless daemon socket is
absent, so the pre-install `docker images` probe printed a raw daemon
connection error to the terminal. The surrounding notices already convey
the meaningful state (service not running → image not setup), so the raw
error was noise.
Capture the probe output and redirect its stderr to libreportal.log
instead of the terminal, keeping the detail for diagnostics.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>