Добавлены evaluation.py (EvalLine/EvalValue/is_check_line) и checks.py (form_variant, subline_parents, evaluate_relations, checks_from). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01BJKMLHdxMwSUeYcdkwqX4W