feat(batch23): implement route lifecycle, solicitation, dedupe, and iteration

dotnet/src/ZB.MOM.NatsNet.Server/ClientConnection.Routes.cs

@@ -449,4 +449,38 @@ public sealed partial class ClientConnection
         if (buf.Length > 0)
             EnqueueProto(buf);
     }
+
+    internal bool ImportFilter(string subject) => CanImport(subject);
+
+    internal bool IsSolicitedRoute() => Route?.DidSolicit == true;
+
+    internal Exception? ProcessRouteConnect(byte[] arg)
+    {
+        if (arg is not { Length: > 0 })
+            return new FormatException("processRouteConnect parse error");
+
+        ConnectInfo? info;
+        try
+        {
+            info = JsonSerializer.Deserialize<ConnectInfo>(arg);
+        }
+        catch (Exception ex)
+        {
+            return ex;
+        }
+
+        if (info is null)
+            return new FormatException("processRouteConnect missing CONNECT payload");
+
+        lock (_mu)
+        {
+            Opts.Name = info.Name;
+            Opts.Headers = info.Headers;
+            Route ??= new Route();
+            Route.Lnoc = info.Lnoc;
+            Route.Lnocu = info.Lnocu;
+        }
+
+        return null;
+    }
 }