Populate BossPhaseSet with add-style and stance-swap plans per boss (melee pool 6100-6104, ranged pool 6150-6151/6200-6204); stance-swap lists the full position ult pool in removes so random injected ults are always cleared. Mount phase_ids on 6006/6101-6106.
Twelve plans across four bosses (melee/mage/archer/tank), clear-replace and keep-add modes interleaved, hp and time trigger dimensions. Four bosses wired with phase_ids pools for random plan selection.
