v1.3.0 - environment support + processing unit selection New features: - environment section in installer YAML config for passing env vars into containers (container_env mapping, CLI flags, .env defaults) - built-in --processing-unit flag (cpu, cuda, rocm) in every generated installer - no opt-in required, any user can choose at start time - --gpus flag for GPU device selection (maps to NVIDIA_VISIBLE_DEVICES or HIP_VISIBLE_DEVICES depending on processing unit) - docker-compose.cuda.yml and docker-compose.rocm.yml overlays generated automatically, merged by compose() at runtime Breaking changes: - CLI flags renamed: -p -> --port, -c -> --cpus, -r -> --memory, -s -> --swap - gpu: true YAML field removed (processing unit support is now unconditional)