feat: reduce span exposition (#10171)

This only avoids the creation of duplicates spans

codex-rs/core/src/stream_events_utils.rs

@@ -51,7 +51,12 @@ pub(crate) async fn handle_output_item_done(
         // The model emitted a tool call; log it, persist the item immediately, and queue the tool execution.
         Ok(Some(call)) => {
             let payload_preview = call.payload.log_payload().into_owned();
-            tracing::info!("ToolCall: {} {}", call.tool_name, payload_preview);
+            tracing::info!(
+                thread_id = %ctx.sess.conversation_id,
+                "ToolCall: {} {}",
+                call.tool_name,
+                payload_preview
+            );
 
             ctx.sess
                 .record_conversation_items(&ctx.turn_context, std::slice::from_ref(&item))

codex-rs/core/src/tasks/mod.rs

@@ -14,7 +14,7 @@ use tokio::sync::Notify;
 use tokio_util::sync::CancellationToken;
 use tokio_util::task::AbortOnDropHandle;
 use tracing::Instrument;
-use tracing::info_span;
+use tracing::Span;
 use tracing::trace;
 use tracing::warn;
 
@@ -132,8 +132,7 @@ impl Session {
             let ctx = Arc::clone(&turn_context);
             let task_for_run = Arc::clone(&task);
             let task_cancellation_token = cancellation_token.child_token();
-            let thread_id = self.conversation_id;
-            let session_span = info_span!("session_task", thread_id = %thread_id);
+            let session_span = Span::current();
             tokio::spawn(
                 async move {
                     let ctx_for_finish = Arc::clone(&ctx);