```

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/governance.py

@@ -0,0 +1,54 @@
+from datetime import date
+from decimal import Decimal
+
+from sqlalchemy import Date, Integer, Numeric, String, Text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.core.database import Base
+from app.modules.business.constants import (
+    StatusValue,
+    VersionValue,
+)
+from app.modules.business.models.common import TimestampMixin
+
+
+class Policy(Base, TimestampMixin):
+    __tablename__ = "policies"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
+    title: Mapped[str] = mapped_column(String(255), index=True)
+    policy_type: Mapped[str | None] = mapped_column(String(128), nullable=True)
+    owner_department: Mapped[str | None] = mapped_column(String(128), nullable=True)
+    version: Mapped[str] = mapped_column(String(32), default=VersionValue.V1_0)
+    status: Mapped[str] = mapped_column(String(64), default=StatusValue.POLICY_DRAFT, index=True)
+    effective_date: Mapped[date | None] = mapped_column(Date, nullable=True)
+    feishu_doc_url: Mapped[str | None] = mapped_column(String(1024), nullable=True)
+    summary: Mapped[str | None] = mapped_column(Text, nullable=True)
+
+class Standard(Base, TimestampMixin):
+    __tablename__ = "standards"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
+    title: Mapped[str] = mapped_column(String(255), index=True)
+    standard_type: Mapped[str | None] = mapped_column(String(128), nullable=True)
+    applies_to: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    status: Mapped[str] = mapped_column(String(64), default=StatusValue.VALID, index=True)
+    check_items: Mapped[str | None] = mapped_column(Text, nullable=True)
+    remediation: Mapped[str | None] = mapped_column(Text, nullable=True)
+    policy_code: Mapped[str | None] = mapped_column(String(64), nullable=True, index=True)
+
+class PerformanceMetric(Base, TimestampMixin):
+    __tablename__ = "performance_metrics"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
+    name: Mapped[str] = mapped_column(String(255), index=True)
+    applies_to_role: Mapped[str | None] = mapped_column(String(128), nullable=True)
+    formula: Mapped[str | None] = mapped_column(Text, nullable=True)
+    weight: Mapped[Decimal] = mapped_column(Numeric(5, 2), default=0)
+    data_source: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    auto_score: Mapped[Decimal] = mapped_column(Numeric(8, 2), default=0)
+    confirmed_score: Mapped[Decimal | None] = mapped_column(Numeric(8, 2), nullable=True)
+    status: Mapped[str] = mapped_column(String(64), default=StatusValue.DRAFT, index=True)