Schema Download And Caching From Apollo Studio

✏️ Apollo CLI for client tooling (Mostly replaced by Rover)

Unique: Integrates directly with Apollo Studio's schema registry API, enabling version-aware schema downloads and schema change tracking. Implements local caching with configurable TTL and validation checksums to detect stale schemas.

vs others: Tighter Apollo Studio integration than generic introspection tools; supports schema versioning and change tracking specific to Apollo's platform