fix: preserve consumer config on update, warn not abort; adr accuracy

crates/adapters/nats/src/tests/consumer.rs

@@ -75,12 +75,16 @@ fn consumer_max_deliver_drift_is_updated() {
         filter_subject: "a.>".into(),
         max_deliver: -1,
         ack_wait: ACK_WAIT,
+        max_ack_pending: 77,
+        description: Some("operator".into()),
         ..Default::default()
     };
     let updated = consumer_config_update(&existing, 5).unwrap();
     assert_eq!(updated.max_deliver, 5);
     assert_eq!(updated.durable_name.as_deref(), Some("c"));
     assert_eq!(updated.filter_subject, "a.>");
+    assert_eq!(updated.max_ack_pending, 77);
+    assert_eq!(updated.description.as_deref(), Some("operator"));
     let same = jetstream::consumer::Config {
         max_deliver: 5,
         ..existing