Record discrete biomarker readings (HbA1c, LDL, ferritin, TSH, …) with
their value, unit, reference range and sample date. The store pairs with
the annual blood-panel reminder, which until now had nowhere to record
the result it reminds the user to obtain.
The list/create/update/delete endpoints narrow userId from the session,
build the write data field-by-field, soft-delete via deletedAt, and
encrypt the optional note at rest. A neutral three-state reference-range
classifier (in-range / below / above / unknown) is computed
server-side so every surface renders the same calm verdict.
findLatestLabResultForAnalytes exposes the read point the blood-panel
reminder consults to mark itself satisfied, without coupling the two.
