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//! Health check endpoints for liveness and readiness probes.
//!
//! # Provides
//!
//! - [`router()`] — returns a `Router<AppState>` with `/_live` and `/_ready` mounted.
//! - [`HealthCheck`] — trait for types that can verify their own readiness.
//! - [`HealthChecks`] — fluent builder that collects named checks; registered in
//! the service registry.
//!
//! When the `db` feature is enabled, [`Database`](crate::db::Database) implements
//! [`HealthCheck`] automatically.
//!
//! # Endpoints
//!
//! - `/_live` — always returns 200 OK (liveness probe)
//! - `/_ready` — runs registered health checks concurrently, returns 200 if
//! all pass, 503 if any fail (readiness probe)
//!
//! # Example
//!
//! ```
//! use modo::HealthChecks;
//! use modo::service::Registry;
//!
//! let checks = HealthChecks::new()
//! .check_fn("database", || async { Ok(()) })
//! .check_fn("redis", || async { Ok(()) });
//!
//! let mut registry = Registry::new();
//! registry.add(checks);
//!
//! let app: axum::Router = axum::Router::new()
//! .merge(modo::health::router())
//! .with_state(registry.into_state());
//! ```
pub use ;
pub use router;