shared: add independent IPv4 and IPv6 collection [CI]

backend/agent/src/MoShiro.Agent/AgentApp.cs

@@ -15,6 +15,7 @@ public sealed class AgentApp : IDisposable
     public const string Version = MoShiro.Protocol.BuildInfo.Version;
 
     private readonly AgentConfig _config;
+    private readonly bool _ipv6Supported;
     private readonly LoadedNodeIdentity _identity;
     private readonly TimeProvider _time;
     private readonly INodeLog _log;
@@ -47,6 +48,12 @@ public sealed class AgentApp : IDisposable
         _uplink = new BackendUplink(time);
 
         IPAddress bind = IPAddress.Parse(config.Listen.Bind);
+        if (bind.Equals(IPAddress.IPv6Any) && !System.Net.Sockets.Socket.OSSupportsIPv6)
+        {
+            bind = IPAddress.Any;
+        }
+
+        _ipv6Supported = bind.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6;
         _admission = new AgentAdmission(_streams);
         _udp = new UdpMux(_sessions, _admission, _clock, _counters.Data, log, bind, config.Listen.UdpPorts);
         _tcp = new TcpAcceptor(bind, config.Listen.TcpPorts, identity.Certificate, _sessions, _counters.Data);
@@ -257,6 +264,7 @@ public sealed class AgentApp : IDisposable
     {
         var meta = new AgentHelloMeta
         {
+            Ipv6Supported = _ipv6Supported,
             Platform = MoShiro.Measurement.PlatformDetector.Detect(),
             TlsSpki = _identity.File.TlsSpki,
             ProbeTcpPort = ControlPort,