Add the request surface and the background sync for the Google Health
provider, all built on the shared integration plumbing.
- Routes under /api/google-health: connect (mint the PKCE pair and state
nonce, redirect to Google), callback (timing-safe CSRF, atomic state
consume, token exchange, connection upsert, clear the reauth flag,
enqueue backfill), credentials (encrypt the operator's BYO client id
and secret field-by-field), disconnect, status, and a rate-limited
manual sync.
- Jobs: a boot-time backfill, an hourly poll cohort, and a daily
oauth-state cleanup, registered under the existing dead-queue contract.
- Rank GOOGLE_HEALTH just after Fitbit in the per-metric source ladders;
it is the successor API for the same devices.
- Add GOOGLE_HEALTH to the readable measurement-source enum but leave it
out of the writable set — the provider is server-owned, so a client
cannot attribute a write to it.
- Register the two new encrypted token columns and the two BYO-client
columns in the encryption-rotation registry and the rotation script.
Marc-André Bombeck
b26a18d35e