`aggregate=daily|weekly|monthly` averaged step counts (and every
other cumulative HK type) instead of summing — partial-day rows
collapsed to a per-bucket mean rather than the daily total.
Five rows of 1000 steps reported 1000, not 5000.
Add `CUMULATIVE_HK_TYPES` in `apple-health-mapping.ts` listing the
five cumulative MeasurementTypes the iOS / Withings ingest path
emits (`ACTIVITY_STEPS`, `ACTIVE_ENERGY_BURNED`, `FLIGHTS_CLIMBED`,
`WALKING_RUNNING_DISTANCE`, `TIME_IN_DAYLIGHT`). The route picks
`SUM(value)` for those types and keeps `AVG(value)` for every spot
metric (BP, pulse, weight, BG, body fat, mood, sleep).
Two new integration cases pin the contract: a step day collapses
to the per-row sum; a pulse day still averages.
Marc-André Bombeck
642e78a6f7