Round 3 fixes: cancelled polling, aggregator invalid_count, filter state, scheduler atomicity, HTTP exception handler, tests

app/core/execution/worker_pool.py

@@ -74,21 +74,36 @@ class AsyncWorkerPool:
         await self._queue.join()
 
     async def resize(self, new_worker_count: int) -> None:
-        """动态调整 Worker 数量：先全部停止，再按新数量启动"""
+        """动态调整 Worker 数量，不丢失队列中的任务"""
         if new_worker_count == self.worker_count:
             return
         logger.info(f"{self.name} resizing from {self.worker_count} to {new_worker_count}")
-        # 安全做法：先 stop 再 start，避免新旧 Worker 竞争 sentinel 导致死锁
-        await self.stop()
+        if new_worker_count > self.worker_count:
+            for i in range(self.worker_count, new_worker_count):
+                self._workers.append(
+                    asyncio.create_task(self._worker_loop(i), name=f"{self.name}-worker-{i}")
+                )
+        elif new_worker_count < self.worker_count:
+            for _ in range(self.worker_count - new_worker_count):
+                await self._queue.put(None)
+            await asyncio.sleep(0)
+            still_running = []
+            for w in self._workers:
+                if w.done():
+                    try:
+                        await w
+                    except asyncio.CancelledError:
+                        pass
+                else:
+                    still_running.append(w)
+            self._workers = still_running
         self.worker_count = new_worker_count
-        await self.start()
 
     async def _worker_loop(self, worker_id: int) -> None:
         while True:
             item = await self._queue.get()
             try:
                 if item is None or not self._running:
-                    self._queue.task_done()
                     break
                 await self.handler(item)
             except Exception as e: