```

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/tasks/legacy.py

@@ -0,0 +1,54 @@
+from typing import Any
+
+from app.core.constants import ActorValue
+from app.core.database import SessionLocal
+from app.tasks.app import celery_app
+
+
+@celery_app.task(name="legacy.sync_projects")
+def sync_legacy_projects(
+    source_query: str | None = None,
+    source_query_name: str | None = None,
+    field_map: dict[str, str] | None = None,
+    limit: int = 100,
+    dry_run: bool = False,
+    actor: str = ActorValue.SCHEDULER,
+) -> dict[str, Any]:
+    from app.modules.legacy_mysql.services import LegacyMySQLService
+
+    db = SessionLocal()
+    try:
+        return LegacyMySQLService(db).sync_projects(
+            source_query=source_query,
+            source_query_name=source_query_name,
+            field_map=field_map or {},
+            limit=limit,
+            dry_run=dry_run,
+            actor=actor,
+        )
+    finally:
+        db.close()
+
+@celery_app.task(name="legacy.sync_tasks")
+def sync_legacy_tasks(
+    source_query: str | None = None,
+    source_query_name: str | None = None,
+    field_map: dict[str, str] | None = None,
+    limit: int = 100,
+    dry_run: bool = False,
+    actor: str = ActorValue.SCHEDULER,
+) -> dict[str, Any]:
+    from app.modules.legacy_mysql.services import LegacyMySQLService
+
+    db = SessionLocal()
+    try:
+        return LegacyMySQLService(db).sync_tasks(
+            source_query=source_query,
+            source_query_name=source_query_name,
+            field_map=field_map or {},
+            limit=limit,
+            dry_run=dry_run,
+            actor=actor,
+        )
+    finally:
+        db.close()