shared: add independent IPv4 and IPv6 collection [CI]

backend/fleet/src/Fleet.Link/Peer.cs

@@ -57,6 +57,11 @@ public sealed class PeerListener
     public async Task RunAsync(CancellationToken ct)
     {
         var listener = new TcpListener(_options.Listen);
+        if (_options.Listen.Address.Equals(IPAddress.IPv6Any))
+        {
+            listener.Server.DualMode = true;
+        }
+
         listener.Start();
         Port = ((IPEndPoint)listener.LocalEndpoint).Port;
         Started.TrySetResult();
@@ -219,7 +224,8 @@ public static class PeerConnector
     public static async Task<(PeerSessionInfo Info, TlsFrameTransport Transport)> ConnectAsync(
         string host, int port, byte[] expectedSpkiSha256, NodeIdentity identity, string peerId, string? version, int maxFrameBytes, TimeProvider time, CancellationToken ct)
     {
-        var client = new TcpClient { NoDelay = true };
+        TcpClient client = IPAddress.TryParse(host, out IPAddress? address) ? new TcpClient(address.AddressFamily) : new TcpClient();
+        client.NoDelay = true;
         PeerSockets.EnableKeepAlive(client.Client);
         try
         {