How long each cadence's period lasts, rolling: a digest covers the one just
ended, and the /community page the one ending now.
Record<DigestCadence, number>
How long each cadence's period lasts, rolling: a digest covers the one just
ended, and the /community page the one ending now.
Record<DigestCadence, number>
import { PERIOD_MS } from "shared/settings.ts";