fix: merge conflict 해결 — BossRaid 토큰 Dictionary 처리 및 개별 전송

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

MMOTestServer/MMOserver/Game/GameServer.cs

@@ -122,7 +122,7 @@ public class GameServer : ServerBase
         {
             // 신규 연결: 웹서버에 JWT 검증 요청
             string? username = await RestApi.Instance.VerifyTokenAsync(token);
-            if (username == null)
+            if (username == null || username.Trim().Length <= 0)
             {
                 Log.Warning("[Server] 토큰 검증 실패 - 연결 거부 PeerId={Id}", peer.Id);
                 userUuidGenerator.Release(hashKey);
@@ -1114,7 +1114,11 @@ public class GameServer : ServerBase
         List<string> userNames = new List<string>();
         foreach (int memberId in party.PartyMemberIds)
         {
-            userNames.Add(channel.GetPlayer(memberId).Nickname);
+            Player? memberPlayer = channel.GetPlayer(memberId);
+            if (memberPlayer != null)
+            {
+                userNames.Add(memberPlayer.Nickname);
+            }
         }
 
         BossRaidResult? result = await RestApi.Instance.BossRaidAccesssAsync(userNames, 1);