gameserver: bit-position diagnostics in ReceivedPacket (header + bunch flags)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/Prospect.Unreal/Net/UNetConnection.cs

@@ -541,6 +541,9 @@ public abstract class UNetConnection : UPlayer
                 }
             }
 
+            Logger.Information("[HS-HDR] seq={Seq} ackedSeq={Acked} historyWords={HW} posAfterHeader={Pos} bitsLeft={Left}",
+                header.Seq.Value, header.AckedSeq.Value, header.HistoryWordCount, reader.GetPosBits(), reader.GetBitsLeft());
+
             var packetSequenceDelta = PacketNotify.GetSequenceDelta(header);
 
             // The Cycle client doesn't derive its initial packet sequences from the handshake
@@ -655,6 +658,9 @@ public abstract class UNetConnection : UPlayer
                 bunch.bIsReplicationPaused = reader.ReadBit();
                 bunch.bReliable = reader.ReadBit();
 
+                Logger.Information("[HS-BUNCH] startBit={Start} posBeforeChIndex={Pos} bitsLeft={Left} bControl={C} bOpen={O} bClose={Cl} bReliable={R} netVer={V}",
+                    incomingStartPos, reader.GetPosBits(), reader.GetBitsLeft(), bControl, bunch.bOpen, bunch.bClose, bunch.bReliable, (int)bunch.EngineNetVer());
+
                 if (bunch.EngineNetVer() < EEngineNetworkVersionHistory.HISTORY_MAX_ACTOR_CHANNELS_CUSTOMIZATION)
                 {
                     const int oldMaxActorChannels = 10240;