```

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/ai_agent/adapters/noop.py

@@ -0,0 +1,25 @@
+from typing import Any
+
+
+from app.modules.ai_agent.adapters.base import AIAdapter
+from app.modules.ai_agent.constants import (
+    NOOP_PROVIDER_ANSWER,
+    AIProviderName,
+    AIRequestKey,
+    AIResponseKey,
+)
+
+
+class NoopAdapter(AIAdapter):
+    """Deterministic adapter used when no model provider is configured."""
+
+    provider_name = AIProviderName.NOOP
+
+    def ask(self, prompt: str, context: dict[str, Any] | None = None) -> dict[str, Any]:
+        return {
+            AIResponseKey.ANSWER: NOOP_PROVIDER_ANSWER,
+            AIResponseKey.RAW: {
+                AIRequestKey.PROMPT: prompt,
+                AIRequestKey.CONTEXT: context or {},
+            },
+        }