집계 기준을 일별/주별/월별로 변경하면서 차트 API의 aggregation, 구간 라벨, 금액 존재 여부를 확인했습니다.
일별: API aggregation=DAILY, series=4, points=120, positivePoints=12, request=direct API
주별: API aggregation=WEEKLY, series=4, points=20, positivePoints=8, request=https://api-dev.biscuitpay.com/api/v1/admin/biscuit-card-dashboard/channel-trends?from=2026-04-22&to=2026-05-21&aggregation=WEEKLY
월별: API aggregation=MONTHLY, series=4, points=8, positivePoints=5, request=https://api-dev.biscuitpay.com/api/v1/admin/biscuit-card-dashboard/channel-trends?from=2026-04-22&to=2026-05-21&aggregation=MONTHLY