feat: unify object observation API

crates/wip-tui/tests/runtime_async.rs

@@ -50,7 +50,7 @@ impl Transport for ScriptedTransport {
                 detail: "scripted local conversion failure".into(),
             });
         }
-        if self.fail_tree_prepare && request.uri().path().ends_with("/v1/fetch_tree") {
+        if self.fail_tree_prepare && request.uri().path().ends_with("/v1/observe") {
             return Err(TransportError {
                 kind: TransportErrorKind::Disconnect,
                 detail: "scripted tree conversion failure".into(),
@@ -61,7 +61,7 @@ impl Transport for ScriptedTransport {
 
     fn execute(&self, request: Self::Prepared) -> Result<Response<Vec<u8>>, TransportError> {
         let sequence = self.sequence.fetch_add(1, Ordering::AcqRel);
-        if request.uri().path().ends_with("/v1/fetch_tree")
+        if request.uri().path().ends_with("/v1/observe")
             && self
                 .root_tree_protocol_failures
                 .fetch_update(Ordering::AcqRel, Ordering::Acquire, |remaining| {
@@ -70,7 +70,7 @@ impl Transport for ScriptedTransport {
                 .is_ok()
         {
             return Ok(encode_protocol_error_response(
-                ProtocolInteraction::FetchTree,
+                ProtocolInteraction::Observe,
                 &ProtocolError {
                     code: ProtocolErrorCode::Internal,
                     message: "scripted startup failure".into(),
@@ -80,9 +80,9 @@ impl Transport for ScriptedTransport {
             .expect("encode tree failure"));
         }
         if self.delayed_after_startup && sequence > 0 {
-            // Each refresh starts object then tree. Make the first pair lose to
-            // the second pair to exercise exact RequestId ownership.
-            let delay = if matches!(sequence, 1 | 2) { 80 } else { 5 };
+            // Delay the first refresh so the second wins and exercises exact
+            // RequestId ownership.
+            let delay = if sequence == 1 { 80 } else { 5 };
             thread::sleep(Duration::from_millis(delay));
         }
         if self.panic_calls && request.uri().path().ends_with("/v1/call_operation") {