chore: import upstream snapshot with attribution

examples/spider/spider_eval/async_utils.py

@@ -0,0 +1,38 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+import asyncio
+import queue
+import threading
+from typing import Any, Coroutine
+
+
+def run_sync_ephemeral(coro: Coroutine[Any, Any, Any]) -> Any:
+    """
+    Run an async coroutine from sync code.
+    - If no loop in this thread: use asyncio.run() directly.
+    - If already in an event loop: spawn a worker thread that calls asyncio.run()
+      (which creates and closes a brand-new event loop per call).
+    """
+    try:
+        asyncio.get_running_loop()
+    except RuntimeError:
+        # No running loop in this thread; safe to use asyncio.run
+        return asyncio.run(coro)
+
+    # Already in a running loop -> execute in a worker thread
+    q = queue.Queue[Any]()
+
+    def worker():
+        try:
+            result = asyncio.run(coro)  # creates & closes its own loop
+            q.put((True, result))
+        except BaseException as e:
+            q.put((False, e))
+
+    t = threading.Thread(target=worker, daemon=True)
+    t.start()
+    ok, payload = q.get()
+    t.join()
+    if ok:
+        return payload
+    raise payload