fix(tools): support daemon pool workers on Python 3.14

Cherry-picked from #111814. The same feature-detected fix was proposed earlier in
#58699, #65182 and #57459 (final form).

Co-authored-by: nankingjing <76432572+nankingjing@users.noreply.github.com>
Co-authored-by: TheNeuralVault <jdkabattles@gmail.com>
Co-authored-by: gongyi <yigongsyl@gmail.com>

tools/daemon_pool.py

@@ -36,7 +36,7 @@ class DaemonThreadPoolExecutor(ThreadPoolExecutor):
         return super().submit(_run_with_context, *args, **kwargs)
 
     def _adjust_thread_count(self) -> None:
-        # Mirrors CPython's implementation (3.8–3.13) with two changes:
+        # Mirrors CPython's implementation with two changes:
         # daemon=True and no _threads_queues registration.
         if self._idle_semaphore.acquire(timeout=0):
             return
@@ -46,11 +46,27 @@ class DaemonThreadPoolExecutor(ThreadPoolExecutor):
         num_threads = len(self._threads)
         if num_threads < self._max_workers:
             thread_name = "%s_%d" % (self._thread_name_prefix or self, num_threads)
+            executor_ref = weakref.ref(self, weakref_cb)
+            if hasattr(self, "_create_worker_context"):
+                # Python 3.14 replaced _initializer/_initargs with a factory
+                # that supplies the worker's initializer context.
+                worker_args = (
+                    executor_ref,
+                    self._create_worker_context(),
+                    self._work_queue,
+                )
+            else:
+                worker_args = (
+                    executor_ref,
+                    self._work_queue,
+                    self._initializer,
+                    self._initargs,
+                )
             # Carry the active profile into the review thread so MEMORY.md / skill review writes land in the
             # right profile (#54937).
             t = threading.Thread(
                 name=thread_name, target=_worker, daemon=True,
-                args=(weakref.ref(self, weakref_cb), self._work_queue, self._initializer, self._initargs),
+                args=worker_args,
             )
             t.start()
             self._threads.add(t)