/**
 * Port for typed index shard I/O.
 *
 * Domain services work with IndexShard subclasses (MetaShard,
 * EdgeShard, LabelShard). The adapter owns serialization and
 * raw Git storage. This port replaces the ad-hoc `loadShard`
 * callback pattern used by IncrementalIndexUpdater and
 * StreamingBitmapIndexBuilder.
 *
 * Complements IndexStorePort (which handles bulk stream I/O)
 * with single-shard random access needed by incremental updates.
 */
export default class ShardPort {
}
