fix: complete retail parity stability pass

src/AcDream.Core.Net/Transport/TransportStats.cs

@@ -9,6 +9,15 @@ namespace AcDream.Core.Net.Transport;
 /// </summary>
 internal sealed class TransportStats
 {
+    /// <summary>Checksum-valid post-negotiation datagrams received. Used by
+    /// retail's 2-second/40-sample link-status loss window.</summary>
+    public long PacketsReceived;
+
+    /// <summary>Datagrams successfully emitted after transport negotiation.
+    /// Includes reliable traffic, retransmits, cumulative ACKs, and NAKs,
+    /// matching retail's packet-level denominator.</summary>
+    public long PacketsSent;
+
     /// <summary>Datagrams re-emitted in response to a server NAK.</summary>
     public long ResendsSent;
 
@@ -57,6 +66,11 @@ internal sealed class TransportStats
     /// <c>ReceiverData::GetNaks @ 0x005490C0</c>, ≤114 ids each).</summary>
     public long NaksSent;
 
+    /// <summary>Total missing sequence ids carried by emitted NAKs. Retail's
+    /// <c>CLinkStatusSnapshot::nPktsNAKed</c> counts missing packets, not the
+    /// number of control datagrams used to request them.</summary>
+    public long NakIdsSent;
+
     /// <summary>N4: mis-parked keystream words reclaimed from validated
     /// cleartext <c>RejectRetransmit</c> sequences (the AD-51 ACE
     /// adaptation; always zero against a retail server).</summary>