Treat EndOfRLPException as invalid packet in peer discovery

When processing peer discovery packets, EndOfRLPException from malformed
RLP-encoded ENR responses should be treated as invalid packets and
discarded with debug-level logging, similar to DecodeException and
PeerDiscoveryPacketDecodingException.

This prevents log pollution from malformed packets received from the
network, which currently get logged as ERROR instead of being quietly
discarded.

Fixes #9596

Signed-off-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: jflo

ethereum/p2p/src/main/java/org/hyperledger/besu/ethereum/p2p/discovery/VertxPeerDiscoveryAgent.java

@@ -58,6 +58,7 @@
 import io.vertx.core.datagram.DatagramPacket;
 import io.vertx.core.datagram.DatagramSocket;
 import io.vertx.core.datagram.DatagramSocketOptions;
+import org.apache.tuweni.rlp.EndOfRLPException;
 import org.ethereum.beacon.discovery.util.DecodeException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -342,7 +343,8 @@ private void handlePacket(final DatagramPacket datagram) {
             handleIncomingPacket(endpoint, event.result());
           } else {
             if (event.cause() instanceof PeerDiscoveryPacketDecodingException
-                || event.cause() instanceof DecodeException) {
+                || event.cause() instanceof DecodeException
+                || event.cause() instanceof EndOfRLPException) {
               LOG.debug(
                   "Discarding invalid peer discovery packet: {}, {}",
                   event.cause().getMessage(),