[Rust] Allow resuming a session that was killed with ctrl + c (#1387)

Previously, if you ctrl+c'd a conversation, all subsequent turns would
400 because the Responses API never got a response for one of its call
ids. This ensures that if we aren't sending a call id by hand, we
generate a synthetic aborted call.

Fixes #1244 


https://github.com/user-attachments/assets/5126354f-b970-45f5-8c65-f811bca8294a

codex-rs/core/src/chat_completions.rs

@@ -425,7 +425,12 @@ where
                         response_id,
                         token_usage,
                     })));
-                } // No other `Ok` variants exist at the moment, continue polling.
+                }
+                Poll::Ready(Some(Ok(ResponseEvent::Created))) => {
+                    // These events are exclusive to the Responses API and
+                    // will never appear in a Chat Completions stream.
+                    continue;
+                }
             }
         }
     }
@@ -439,7 +444,7 @@ pub(crate) trait AggregateStreamExt: Stream<Item = Result<ResponseEvent>> + Size
     ///
     /// ```ignore
     ///     OutputItemDone(<full message>)
-    ///     Completed { .. }
+    ///     Completed
     /// ```
     ///
     /// No other `OutputItemDone` events will be seen by the caller.