//! Database driver integrations.
//!
//! - `scylla` for Athena/ScyllaDB
//! - `postgresql` for direct Postgres
//! - `supabase` for Supabase Postgres poolers
//! - `cloudflare_d1` for proxied Cloudflare D1 access
//!
//! Scylla execution, shared host-health tracking, and the health-aware
//! Supabase client core are now extracted into `crates/athena-driver` and
//! re-exported here through compatibility modules. Cloudflare D1 follows the
//! same pattern: the implementation lives in `crates/athena-driver`, while
//! this module keeps the historical root-crate path stable.