refactor: migrate workflow to v2 core and archive legacy modules

core/events/event_bus.py

@@ -0,0 +1,36 @@
+import asyncio
+import logging
+from typing import Callable, Dict, List, Any, Awaitable
+
+logger = logging.getLogger("cs_agent")
+
+class AsyncEventBus:
+    """
+    异步事件总线：解耦业务触发与平台发送。
+    支持一个事件被多个订阅者监听。
+    """
+    def __init__(self):
+        self._listeners: Dict[str, List[Callable[..., Awaitable[None]]]] = {}
+
+    def subscribe(self, event_type: str, callback: Callable[..., Awaitable[None]]):
+        """订阅事件"""
+        if event_type not in self._listeners:
+            self._listeners[event_type] = []
+        self._listeners[event_type].append(callback)
+        logger.info(f"[EventBus] 新订阅者已注册到事件: {event_type}")
+
+    async def emit(self, event_type: str, **kwargs):
+        """发布事件：异步广播给所有订阅者"""
+        if event_type not in self._listeners:
+            return
+
+        tasks = []
+        for callback in self._listeners[event_type]:
+            tasks.append(asyncio.create_task(callback(**kwargs)))
+        
+        if tasks:
+            await asyncio.gather(*tasks, return_exceptions=True)
+            logger.info(f"[EventBus] 事件 {event_type} 已成功广播给 {len(tasks)} 个订阅者")
+
+# 全局单例，所有模块共用这一个广播台
+bus = AsyncEventBus()