Fix: Use negotiated protocol version in Status message

Previously, EthNodeStatus64ExchangeState hardcoded protocolVersion to 64
in the Status message, even when higher versions (ETH65-ETH68) were
negotiated. This caused peers to reject our Status messages and disconnect
with reason 0x10 (Other).

Changes:
- Added negotiatedCapability parameter to EthNodeStatus64ExchangeState
- Modified createStatusMsg() to use negotiatedCapability.version instead
  of hardcoded Capability.ETH64.version
- Updated EtcHelloExchangeState to pass negotiated capability and log
  the actual negotiated version instead of generic "eth/64+"
- All existing tests pass

Co-authored-by: realcodywburns <13103499+realcodywburns@users.noreply.github.com>

Author: Copilot

src/main/scala/com/chipprbots/ethereum/network/handshaker/EtcHelloExchangeState.scala

@@ -36,9 +36,9 @@ case class EtcHelloExchangeState(handshakerConfiguration: EtcHandshakerConfigura
       case Some(Capability.ETH63) =>
         log.debug("Negotiated protocol version with client {} is eth/63", hello.clientId)
         EthNodeStatus63ExchangeState(handshakerConfiguration)
-      case Some(Capability.ETH64 | Capability.ETH65 | Capability.ETH66 | Capability.ETH67 | Capability.ETH68) =>
-        log.debug("Negotiated protocol version with client {} is eth/64+", hello.clientId)
-        EthNodeStatus64ExchangeState(handshakerConfiguration)
+      case Some(negotiated @ (Capability.ETH64 | Capability.ETH65 | Capability.ETH66 | Capability.ETH67 | Capability.ETH68)) =>
+        log.debug("Negotiated protocol version with client {} is {}", hello.clientId, negotiated)
+        EthNodeStatus64ExchangeState(handshakerConfiguration, negotiated)
       case _ =>
         log.debug(
           s"Connected peer does not support eth/63-68 or etc/64 protocol. Disconnecting."

src/main/scala/com/chipprbots/ethereum/network/handshaker/EthNodeStatus64ExchangeState.scala

@@ -14,7 +14,8 @@ import com.chipprbots.ethereum.network.p2p.messages.ETH64
 import com.chipprbots.ethereum.network.p2p.messages.WireProtocol.Disconnect
 
 case class EthNodeStatus64ExchangeState(
-    handshakerConfiguration: EtcHandshakerConfiguration
+    handshakerConfiguration: EtcHandshakerConfiguration,
+    negotiatedCapability: Capability
 ) extends EtcNodeStatusExchangeState[ETH64.Status] {
 
   import handshakerConfiguration._
@@ -43,7 +44,7 @@ case class EthNodeStatus64ExchangeState(
     val genesisHash = blockchainReader.genesisHeader.hash
 
     val status = ETH64.Status(
-      protocolVersion = Capability.ETH64.version,
+      protocolVersion = negotiatedCapability.version,
       networkId = peerConfiguration.networkId,
       totalDifficulty = chainWeight.totalDifficulty,
       bestHash = bestBlockHeader.hash,