Suggested build order

The order that surfaces integration problems earliest.

1. Create user. Smallest surface, and it proves your key and plumbing end to end.
2. Ingest with a small hand-built batch of known coordinates, before touching the camera roll. Confirms your payload shape in isolation.
3. Camera-roll reader. Start with an RN package, profile it, and drop to native if needed. No API dependency, so it can run in parallel.
4. Sync lifecycle. Wire sync-complete and the has_synced branch as soon as the reader works. Leaving it until last means testing every scan as a first-time scan and never exercising the incremental path.
5. Events tab. One call, and it gives you event detail for free.
6. Profile. A single read.