Weekly sync window was pulling images but using docker start after rsync,
which ignores the new digest. Containers in the emby/critical-data profiles
(Emby, Mariadb, Redis) never actually landed on updated images.
docker_update_remaining.sh merged into docker_update.sh --remainder, which
already had better exclusion logic. Added WEEKLY_REMAINING_UPDATES toggle
and WEEKLY_RESTART_CONTAINERS exclusion to remainder mode.
Onboard now runs docker_network_connect.sh on mirror before deploying stacks.