fix: Prevent double-prefixing of S2A team names and refactor Telegram bot's thread pool usage for non-blocking execution.

telegram_bot.py

@@ -3985,18 +3985,16 @@ class ProvisionerBot:
                 if worker_id in current_steps:
                     del current_steps[worker_id]
         
-        # 使用线程池并发执行
+        # 使用线程池并发执行 (通过 run_in_executor 避免阻塞 event loop)
         import concurrent.futures
         
+        loop = asyncio.get_event_loop()
         with concurrent.futures.ThreadPoolExecutor(max_workers=workers) as executor:
-            futures = [executor.submit(worker_task, i) for i in range(workers)]
-            
-            # 等待所有任务完成
-            for future in concurrent.futures.as_completed(futures):
-                try:
-                    future.result()
-                except Exception as e:
-                    log.error(f"Worker 异常: {e}")
+            async_futures = [loop.run_in_executor(executor, worker_task, i) for i in range(workers)]
+            results_done = await asyncio.gather(*async_futures, return_exceptions=True)
+            for r in results_done:
+                if isinstance(r, Exception):
+                    log.error(f"Worker 异常: {r}")
         
         # 检查是否被停止
         stopped = False