```

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/business/models/legacy.py

@@ -0,0 +1,28 @@
+from datetime import datetime
+
+from sqlalchemy import DateTime, Integer, String, Text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.core.database import Base
+from app.core.utils.time import utc_now
+from app.modules.business.constants import (
+    StatusValue,
+)
+from app.modules.business.models.common import TimestampMixin
+
+
+class LegacySyncRun(Base, TimestampMixin):
+    __tablename__ = "legacy_sync_runs"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
+    domain: Mapped[str] = mapped_column(String(128), index=True)
+    source_table: Mapped[str | None] = mapped_column(String(128), nullable=True, index=True)
+    status: Mapped[str] = mapped_column(String(32), default=StatusValue.RUNNING, index=True)
+    started_at: Mapped[datetime] = mapped_column(DateTime, default=utc_now, index=True)
+    finished_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+    created_count: Mapped[int] = mapped_column(Integer, default=0)
+    updated_count: Mapped[int] = mapped_column(Integer, default=0)
+    skipped_count: Mapped[int] = mapped_column(Integer, default=0)
+    error_message: Mapped[str | None] = mapped_column(Text, nullable=True)
+    note: Mapped[str | None] = mapped_column(Text, nullable=True)