Modernize Holepunch stack for HyperDB 6 and current replication APIs

Align P2NS with current Autopass, Hypercore, Hyperdrive, and Protomux behavior:
add plugin DB recovery for incompatible persisted HyperDB data, stop
unconditional spec rebuilds via fingerprinting, update SDK replication paths,
and align proxy invite channels with p2ns.core-* protocols without replicating
Autopass over the p2ns topic.

proxy-server/p2ns_proxy_server.js

@@ -723,17 +723,13 @@ async function setupP2NS() {
   // Configure Hyperswarm for better local network peer discovery
   const swarmOptions = {
     keyPair: state.keypair,
-    ephemeral: false,
-    maxPeers: parseInt(process.env.MAX_PEERS || '24', 10),
-    queue: {
-      multiplex: true
-    }
+    maxPeers: parseInt(process.env.MAX_PEERS || '24', 10)
   };
   
   const swarm = new Hyperswarm(swarmOptions);
   state.swarm = swarm;
   logInfo('Main', 'Hyperswarm instance created with persisted keypair');
-  logInfo('Main', `Hyperswarm configured: maxPeers=${swarmOptions.maxPeers}, ephemeral=${swarmOptions.ephemeral}`);
+  logInfo('Main', `Hyperswarm configured: maxPeers=${swarmOptions.maxPeers}`);
   
   let dnsPass = null;
   let core = null;
@@ -773,11 +769,12 @@ async function setupP2NS() {
     }
     
     state.connectedPeers.add(peerId);
-    store.replicate(conn, { live: true });
-    
+    // Do not replicate the full Corestore on the p2ns topic — Autopass uses its own pairing/replication.
+    logDebug('Swarm', 'Skipping p2ns-topic Corestore replication (Autopass handles dnsPass sync)');
+
     const mux = Protomux.from(conn);
-    const inviteChannel = mux.createChannel({ protocol: 'p2ns-invite' });
-    const requestChannel = mux.createChannel({ protocol: 'p2ns-request' });
+    const inviteChannel = mux.createChannel({ protocol: 'p2ns.core-invite' });
+    const requestChannel = mux.createChannel({ protocol: 'p2ns.core-request' });
     
     const inviteMessage = inviteChannel.addMessage({
       encoding: c.string,