feat: Stop publishing CIDs to DHT on write

[dav1do]

Linear ticket WS1-1400.

Removed CID publishing to the DHT. We still have the RPCs to publish to the DHT (in p2p/rpc.rs and the corresponding beetle client), but we no longer do it on write, and the node no longer has a publisher.

[linear]

WS1-1400 Remove publish CIDs to DHT logic

[nathanielc]

We should also remove the publisher and its related logic. Otherwise looks good.

The publisher lives in p2p/src/publisher.rs. That whole module can be removed which will result in some changes to node.rs as well.

[dav1do]

We should also remove the publisher and its related logic. Otherwise looks good.

The publisher lives in p2p/src/publisher.rs. That whole module can be removed which will result in some changes to node.rs as well.

Thanks, added (or deleted?). I wasn't sure which of these we wanted to keep for future compatibility, and which we wanted to nuke. Makes sense that the RPC stays, everything else goes.