fix(peers): count and relay peers even when storage is full

Previously, when seenPeers reached MAX_PEERS, new peer messages were
completely dropped - never verified, counted, or relayed. This caused
the node to stop discovering new peers and stop propagating messages.

Now we always verify, count (HyperLogLog), and relay valid messages.
We just don't store peers in seenPeers if we're at capacity.

server.js

@@ -10,7 +10,7 @@ const TOPIC_NAME = "hypermind-lklynet-v1";
 const TOPIC = crypto.createHash("sha256").update(TOPIC_NAME).digest();
 
 // Gossip protocol tuning
-const GOSSIP_FANOUT = 3; // Relay to max 3 random peers instead of all
+const GOSSIP_FANOUT = 10; // Relay to max 10 random peers instead of all
 const HEARTBEAT_INTERVAL_FAST = 1000; // 1 second during startup
 const HEARTBEAT_INTERVAL_SLOW = 15000; // 15 seconds at steady state
 const STARTUP_DURATION = 120000; // Stay in fast mode for 2 minutes
@@ -276,9 +276,6 @@ function handleMessage(msg, sourceSocket) {
     // 3. Verify Signature
     if (!sig) return;
     try {
-      // Enforce MAX_PEERS for new peers
-      if (!stored && seenPeers.size >= MAX_PEERS) return;
-
       // Get or create the raw DER buffer (lightweight storage)
       const keyDer = stored?.keyDer || Buffer.from(id, "hex");
       
@@ -310,11 +307,14 @@ function handleMessage(msg, sourceSocket) {
       const now = Date.now();
       const wasNew = !stored;
       
-      // Store raw DER buffer instead of heavy KeyObject (~100 bytes vs ~2-5KB)
-      // Note: seenPeers is capped at MAX_PEERS, but peerCounter tracks all
-      seenPeers.set(id, { seq, lastSeen: now, keyDer });
+      // Store in seenPeers only if we have room (memory limit)
+      // But we still count and relay even if we can't store
+      const canStore = stored || seenPeers.size < MAX_PEERS;
+      if (canStore) {
+        seenPeers.set(id, { seq, lastSeen: now, keyDer });
+      }
 
-      if (wasNew || countChanged) broadcastUpdate();
+      if ((wasNew && canStore) || countChanged) broadcastUpdate();
 
       // Only relay if we haven't already relayed this message (bloom filter check)
       if (hops < 3 && !hasRelayedMessage(id, seq)) {