BREAKING: Remove Dockerfile.rocm, compose.rocm.yaml, and ROCm image
build/push from the release pipeline. Remove AMD quick-start and ROCm
references from README and DEVELOPER docs. Update docker-deployment
and developer-docs specs to reflect CPU + NVIDIA only.
The ROCm variant added significant complexity (4.2GB torch wheel,
>20GB container) with limited usage. Users on AMD GPUs should stay
on engine v3.2.x or switch to CPU mode.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
