BackgroundCompactor class

Background compaction for Rift boxes. Performs incremental compaction without blocking reads.

The BackgroundCompactor runs compaction on registered boxes at regular intervals. This is useful for long-running applications where boxes accumulate deleted/overwritten entries that need to be cleaned up periodically.

Compaction is non-blocking: reads can proceed while compaction is in progress since Rift's architecture supports concurrent reads.

Usage:

final compactor = BackgroundCompactor(
  {'users': usersBox, 'settings': settingsBox},
  interval: Duration(minutes: 10),
);

compactor.start();

// Listen for compaction events
compactor.events.listen((event) {
  print('${event.boxName} compacted in ${event.duration.inMilliseconds}ms');
});

// Stop when done
compactor.stop();