Seven onboarding insight cards for the teaser animation.

Mirrors the cards the mobile HealthKit teaser extracts locally for Apple Health users, but computed server-side from the provider the user just connected. Kinds with no supporting data are omitted.

provider is the brand the mobile client just connected: garmin (direct OAuth), apple_health, or any Terra-backed wearable (coros, whoop, …). The factory's brand scope is the gatekeeper — passing a brand the user isn't connected to returns 422 — and it is what keeps the read deduped against the user's other links (#1693).