- sessions listed from client_events grouped by session id (7d window)
- timeline sheet merges page views, client events, errors, and server-fn
activities joined by player within the session window
- vitals excluded from timelines; gap markers over 5 minutes
- 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
kyle