Push range-aware aggregation into Postgres via `date_trunc` so the
bucket cap applies AFTER bucketising, not before. A 1-year
`aggregate=daily` request on a minute-by-minute pulse account now
walks every row in the window and returns up to 365 daily buckets
instead of silently truncating to the first N raw rows.
Gate the aggregation branch on an explicit `aggregate` query param.
Callers that pass `from`/`to` without `aggregate` (the iOS path)
keep the raw `MeasurementWireDTO` wire shape — the v1.5 locked
contract stays byte-stable. The new `monthly` grain bounds
multi-year "All time" charts at 24 buckets per type.
Marc-André Bombeck
0d256230ef