fix: 采集循环单轮容错 + 事件流水目录自动创建（Linux 首启致命bug）

src/web/server.py

@@ -47,7 +47,13 @@ async def collector_task(_app):
 
     async def poll():
         while True:
-            await loop.run_in_executor(None, collector.one_cycle)
+            try:
+                await loop.run_in_executor(None, collector.one_cycle)
+            except asyncio.CancelledError:
+                raise
+            except Exception:
+                import traceback
+                traceback.print_exc()
             await asyncio.sleep(60)
 
     task = asyncio.create_task(poll())