feat: 接入起卦后端流程并完善积分扣减链路

backend/src/v1/points/dependencies.py

@@ -0,0 +1,12 @@
+from __future__ import annotations
+
+from fastapi import Depends
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from core.db import get_db
+from v1.points.repository import PointsRepository
+from v1.points.service import PointsService
+
+
+def get_points_service(session: AsyncSession = Depends(get_db)) -> PointsService:
+    return PointsService(repository=PointsRepository(session))