Quest Engine

available → active         (start / timer start)
available → completed      (direct complete, bounties only)
active → completed         (complete)
active → failed            (deadline passed)
active → abandoned         (manual abandon)
completed → available      (daily/weekly reset at midnight)

import { createQuestRepository } from "@grindxp/core/vault";

const repo = createQuestRepository(db);

// Create
await repo.create({ title, type, difficulty, skillTags, baseXp });

// Complete (handles XP award + skill update + streak)
await repo.complete(questId, { proofType, proofData, note });

// List with filtering
await repo.list({ status: "active", type: "daily" });