Replication and republish periodically send PUT_RECORD to peers close to key. Replication doesn't extend expiration. Republish extends expiration. [set_replication_interval, set_publication_interval](https://github.com/libp2p/rust-libp2p/blob/9a45db3f82b760c93099e66ec77a7a772d1f6cd3/protocols/kad/src/behaviour.rs#L330-L368)
Replication and republish periodically send PUT_RECORD to peers close to key.
Replication doesn't extend expiration.
Republish extends expiration.
set_replication_interval, set_publication_interval