debug lines added

RelayServer/Services/Chat/ChatSocketBehavior.cs

@@ -5,6 +5,7 @@ using RelayServer.Services.Data;
 using RelayServer.Services.Rtc;
 using WebSocketSharp;
 using WebSocketSharp.Server;
+using ErrorEventArgs = WebSocketSharp.ErrorEventArgs;
 
 namespace RelayServer.Services.Chat;
 
@@ -77,8 +78,14 @@ public class ChatSocketBehavior : WebSocketBehavior
     protected override void OnClose(CloseEventArgs e)
     {
         RtcChannelPresenceService.RemoveSession(ID);
+        Console.WriteLine($"WebSocket closed: session={ID}, code={e.Code}, reason={e.Reason}");
         base.OnClose(e);
     }
+    protected override void OnError(ErrorEventArgs e)
+    {
+        Console.WriteLine($"WebSocket error: session={ID}, message={e.Message}");
+        base.OnError(e);
+    }
 
     /// <summary>
     /// Extracts a display username from a stored user record id value.