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- Fix ConsistentHashPlacement.PlaceActor() to use consistent hash ring - Implement ConsistentHashPlacement.RebalanceShards() to redistribute shards - Implement ClusterManager.handleRebalanceRequest() with actual rebalancing - Implement ClusterManager.handleMigrationRequest() for actor state transfer - Implement ClusterManager.triggerShardRebalancing() to compute and broadcast - Implement DistributedVM.SendMessage() with cross-node NATS routing - Implement DistributedVM.handleRebalanceRequest() to update shard map - Fix route_message handler to check if actor is local before delivery - Update ConsistentHashPlacement.RebalanceShards() test for new behavior - Add handleShardMapUpdate() and broadcastShardMap() to ClusterManager