potential fix for locking issues

tanks-backend/TanksServer/Interactivity/WebsocketServerConnection.cs

@@ -3,8 +3,9 @@ namespace TanksServer.Interactivity;
 internal abstract class WebsocketServerConnection(
     ILogger logger,
     ByteChannelWebSocket socket
-)
+) : IDisposable
 {
+    private readonly SemaphoreSlim _mutex = new(1);
     protected readonly ByteChannelWebSocket Socket = socket;
     protected readonly ILogger Logger = logger;
 
@@ -17,9 +18,24 @@ internal abstract class WebsocketServerConnection(
     public async Task ReceiveAsync()
     {
         await foreach (var buffer in Socket.ReadAllAsync())
-            await HandleMessageAsync(buffer);
+            await LockedAsync(() => HandleMessageLockedAsync(buffer));
         Logger.LogTrace("done receiving");
     }
 
-    protected abstract ValueTask HandleMessageAsync(Memory<byte> buffer);
+    protected abstract ValueTask HandleMessageLockedAsync(Memory<byte> buffer);
+
+    protected async ValueTask LockedAsync(Func<ValueTask> action)
+    {
+        await _mutex.WaitAsync();
+        try
+        {
+            await action();
+        }
+        finally
+        {
+            _mutex.Release();
+        }
+    }
+
+    public void Dispose() => _mutex.Dispose();
 }