//! Unit tests for schema system components
//!
//! This module contains unit tests for the SCIM schema system, including
//! schema registry, validation logic, type definitions, and structure
//! validation. These tests focus on testing schema components in isolation.
//!
//! ## Test Organization
//!
//! - [`structure_validation`] - Schema structure validation tests
//! - [`data_types`] - SCIM data type validation tests