"""Own classifier for 종목토론실 posts: training, evaluation and serving code (docs/classifier-plan.md §3-6).

Self-contained: the pod and node12 import nothing from ``naver_psy``. Modules marked "pure Python" need only the
standard library and are also used locally (export checks, evaluation, the predict worker's parity check);
``model``, ``train``, ``predict``, ``selftest``, ``check_env``, ``export_hf`` and ``serve`` need torch.
"""