//! Data transfer objects (DTOs) and domain models.
//!
//! Convention:
//!   - `*Request`  — inbound JSON body (what the caller sends).
//!   - `*Response` — outbound JSON body (what we return).
//!   - Domain structs without a suffix hold business data (DB row shape, etc.).
//!
//! Keep request/response types thin — no business logic here.

pub mod item;
pub mod pagination;