User guide: ArrayTrain section, v2 commands in the table, v2 accuracy rows,
updated limitations. README status for v2.0.0. Version 2.0.0 (Python package);
the Rust kernels are unchanged and stay simurg_core 1.1.0. uv.lock committed
(uv lock --check clean).
Full suite on the Pi, file by file under the memory guard: 29 files exit 0
(unit: 282 passed), ruff and mypy clean.
kemal