Add ConfigMap training script, update IB/NCCL config in README
- Add ConfigMap with train_nccl.py (VGG11 + CIFAR10 + NCCL)
- Runtime: mount training-scripts ConfigMap to /workspace/scripts
- Runtime: set command to python /workspace/scripts/train_nccl.py
- Runtime: remove /dev/infiniband hostPath (hostdevice-net CNI handles it)
- Runtime: add NCCL_DEBUG_SUBSYS=INIT,NET,IB
- Runtime: add cifar-10 dataset hostPath mount
- README: add NCCL_DEBUG_SUBSYS, cifar-data, MASTER_ADDR auto-config note
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>