dupfinder-setup.sh now verifies nvidia-container-toolkit is present
when a GPU is detected. If missing, prints install instructions and
offers to install it automatically (adds NVIDIA repo, installs toolkit,
configures Docker runtime, restarts Docker).
Without this toolkit Docker silently falls back to CPU even when a
GPU is present and the compose file has the device reservation.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
f37bd76fed