feat: xiaoguo信号管道完整链路

- xiaoguo_scanner: 6看多榜+5看空榜轮换，看空榜命中持仓预警
- 鹏华财富热榜降级静默
- 盯盘cron prompt: 接入xiaoguo信号+关注列表检查
- watchlist新增status=watching区分正式自选vs关注
- 楚江新材、中谷物流加入正式自选并生成策略
- 香农芯创、科安达加入关注列表等待回调
- 新增 docs/xiaoguo-signal-pipeline.md 完整流程文档

data/decisions.json

@@ -3505,6 +3505,36 @@
           "trigger": "技术面重评"
         }
       ]
+    },
+    {
+      "code": "002171",
+      "name": "楚江新材",
+      "type": "自选策略",
+      "status": "active",
+      "source": "auto",
+      "timestamp": "2026-06-22T22:50:00",
+      "cost": null,
+      "entry_low": 15.53,
+      "entry_high": 16.59,
+      "stop_loss": 14.78,
+      "take_profit": 16.47,
+      "action_note": "缩量回踩15.85附近可入，现价16.43偏高等回调",
+      "advice_timeline": []
+    },
+    {
+      "code": "603565",
+      "name": "中谷物流",
+      "type": "自选策略",
+      "status": "active",
+      "source": "auto",
+      "timestamp": "2026-06-22T23:00:00",
+      "cost": null,
+      "entry_low": 10.0,
+      "entry_high": 10.8,
+      "stop_loss": 9.5,
+      "take_profit": 12.0,
+      "action_note": "PE=11极度低估航运周期股，现价10.40在买入区内，等待行业催化",
+      "advice_timeline": []
     }
   ],
   "total": 42,