Poison Bottle

Source: npc/quests/quests_louyang.txt

1. Louyang quest flow grants Poison Bottle as a progression item.
2. Main script grants are:
• getitem 678,2
• getitem 678,5 (plus one intermediate getitem 678,3)
3. Later Louyang stages also consume/check this item in revolution branch.
4. Progress through main dialogue and errands to reach those medicine/poison handover steps.