- Install torch==2.1.2 (CPU wheel) so AutoTokenizer can load models like
DeepSeek-V4-Flash without runtime import errors.
- Keep numpy==1.26.4 pinned; torch 2.1.x is compatible with it.
- Verify torch and transformers AutoTokenizer import in the image build.
Note: tools/docker/* is gitignored, so this file is force-added.