feat: route publishes to jetstream with puback

tests/NATS.Server.Tests/JetStreamPublishTests.cs

@@ -0,0 +1,14 @@
+namespace NATS.Server.Tests;
+
+public class JetStreamPublishTests
+{
+    [Fact]
+    public async Task Publish_to_stream_subject_returns_puback()
+    {
+        await using var fixture = await JetStreamApiFixture.StartWithStreamAsync("ORDERS", "orders.*");
+        var ack = await fixture.PublishAndGetAckAsync("orders.created", "{\"id\":1}");
+
+        ack.Stream.ShouldBe("ORDERS");
+        ack.Seq.ShouldBe((ulong)1);
+    }
+}