```

refactor(core,ai): 调整模块导入路径并移除废弃文件

- 修复 scheduler.py 中的导入路径错误，将 reports.service
  改为 reports.services
- 移除废弃的 app/core/background/task_queue.py 文件
- 移除废弃的 app/modules/ai_agent/adapters.py 文件
- 修复 ai_memory/service.py 中的导入路径错误，将
  events.service 改为 events.services
```

app/modules/risk/services/service.py

@@ -0,0 +1,18 @@
+from sqlalchemy.orm import Session
+
+from app.modules.risk.services.actions import RiskActionMixin
+from app.modules.risk.services.detectors import RiskDetectorMixin
+from app.modules.risk.services.generation import RiskGenerationMixin
+from app.modules.risk.services.query import RiskQueryMixin
+
+
+class RiskService(
+    RiskGenerationMixin,
+    RiskDetectorMixin,
+    RiskActionMixin,
+    RiskQueryMixin,
+):
+    """Evaluate rule-based business risk signals from internal ledgers."""
+
+    def __init__(self, db: Session):
+        self.db = db