- config: batch_size_per_card 14 -> 32 (5090 32GB headroom)
- setup_server.sh: pin nvidia-cudnn-cu13>=9.17 to match the sm_120 wheel
(without it conv2d hits "Cannot load symbol cublasLtCreate" abort)
- new scripts/recreate_container.sh: one-shot rebuild with --shm-size 8g,
preserves /root/.netrc so wandb auth survives, runs setup_server.sh
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>