fix: pose tag naming + swap DWPose detector to YOLOv8m-pose for anime

feat(variator): smart tag ordering, per-category token budget, semantic min-tag topup, familiarity + scene constraints, intent-aware negatives, suggestion engine

feat(prod): rewrite pipeline + NoobAI + ensemble tagger (3xWD14+DeepDanbooru-ready) + 1000 artists + negative templates + history ext + scoring config