Marc-André Bombeck 65e9ecbde6 fix(ingest): keep the batch sample's unit captured, not authoritative ...

The record-unit conversion is now opt-in per caller and only the
`export.xml` archive path opts in. There the attribute is authoritative:
Apple stamps every quantity `<Record>` with the account's own display
unit, so `km` means kilometres and the reading is meaningless without it.

`POST /api/measurements/batch` keeps its documented contract — `unit` is
captured for audit and never read. Nothing in the tree pins the native
client's unit strings for the seventeen convertible identifiers, and a
client that reads a sample in metres while stamping the person's display
unit into the field would have had every walking distance multiplied by a
thousand on ingest. Reading the field there is a wire change and needs
the client's strings pinned first.

The mapping-table audit and the shared conversion module stay. The batch
path's identity behaviour is written down where it is decided and pinned
twice: every convertible identifier round-trips a sibling unit unchanged
by default, and a walking-distance entry sent as `km` is stored as it
arrived. The OpenAPI description says what the server actually does.

Review finding H2.

2026-09-10 00:24:59 +02:00

2.4 MiB

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