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Marc-André BombeckandClaude Opus 4.7
5cc0a00eaf
`POST /api/measurements/batch` accepts up to 500 HealthKit-shaped entries per call, runs each through the new mapping helper, and writes them under `source = APPLE_HEALTH` with the inbound sample UUID as the external id. The composite unique index on `(user_id, type, source, external_id)` does the per-entry dedup; `Idempotency-Key` covers the batch-level retry case so the iOS observer queue can replay in flight without double-writing. Per-entry status (`inserted` / `duplicate` / `skipped`) lets the client advance its sync cursor accurately even when individual rows land on different paths. Skip reasons cover unknown HealthKit identifiers and out-of-plausible-range values so a single bogus sensor reading never rejects an otherwise clean batch. Insertion uses chunked `createMany` with `skipDuplicates: true` so a race between two concurrent retries reconciles cleanly via the unique index instead of failing the transaction. Wide Event annotation logs `processed / inserted / duplicates / skipped` for ops visibility. Six integration tests against a real Postgres testcontainer cover the happy path, the per-entry duplicate path, the over-cap 422, mixed unmappable + out-of-range entries, per-stage sleep rows, and `Idempotency-Key` replay. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>