//! Models module - contains all data structures and business objects
//!
//! This module demonstrates:
//! - Module organization and re-exports
//! - Public/private visibility within modules
//! - Cross-module type definitions
// Declare submodules
// Re-export commonly used types at module level
pub use ;
// Module-level constants
pub const MODULE_VERSION: &str = "1.0.0";
// Module-level type alias
pub type UserId = u64;
// Private helper function (not re-exported)
// Public helper function