- pure rollup accumulators with tests; daily upserts keyed date/metric/dim - alert checks with db-backed cooldown and push to admin players - in-process scheduler started from health probes - health endpoint checks pb + supertokens, stale-while-revalidate, always 200 - sse connection counter moved to emitter - telemetry feature server fns: events/errors/groups/rollups/alerts/status