//! Driver adapters — each behind its Cargo feature.
//!
//! | Feature | Module | Ecosystem |
//! |--------------|------------|--------------------------------------------|
//! | `db-sqlx` | `sqlx` | SQLx `AnyPool` (postgres / mysql / sqlite) |
//! | `db-seaorm` | `seaorm` | SeaORM `DatabaseConnection` |
//! | `db-diesel` | `diesel` | Sync Diesel isolated via `spawn_blocking` |