// SPDX-License-Identifier: BUSL-1.1
//! Mirror subsystem for the Control Plane.
//!
//! - [`registry`] — [`MirrorLinkRegistry`]: tracks active [`CrossClusterLink`]
//! handles per database; used by `ALTER DATABASE PROMOTE` to tear down the
//! source link before the catalog mutation lands.
//! - [`observer`] — lag-transition logic and the
//! `nodedb_database_mirror_lag_ms` metric update path.
//! - [`restart`] — enumerates mirror databases on server start and
//! returns the set that need their observer link re-established.
pub use ;
pub use MirrorLinkRegistry;
pub use ;