```

feat: 添加AI记忆模块和事件调度系统

- 新增AI记忆模块，支持本地记忆召回和自动写入功能
- 实现事件调度系统，支持批量处理待定事件和重试机制
- 集成心跳监控机制，跟踪API、调度器和工作节点状态
- 扩展仪表板数据统计，包含AI记忆条目和心跳概要
- 添加企业运营分析报告功能，提供财务、采购等多维度分析
- 更新配置设置，增加事件调度和AI记忆相关参数
- 优化任务队列，添加事件分发任务类型
- 扩展审计日志，记录AI记忆操作和事件调度行为
- 实现领域事件模型，支持事件持久化和状态管理
- 添加观察性服务，监控系统组件健康状况
```

app/modules/ai_memory/models.py

@@ -0,0 +1,33 @@
+from datetime import datetime
+
+from sqlalchemy import JSON, DateTime, Integer, String, Text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.core.constants import ActorValue
+from app.core.db_base import Base
+from app.core.time import utc_now
+from app.modules.ai_memory.constants import AIMemoryScope, AIMemorySource, AIMemoryStatus
+
+
+class AIMemoryEntry(Base):
+    __tablename__ = "ai_memory_entries"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
+    scope: Mapped[str] = mapped_column(String(64), default=AIMemoryScope.GLOBAL, index=True)
+    subject: Mapped[str] = mapped_column(String(128), index=True)
+    content: Mapped[str] = mapped_column(Text)
+    summary: Mapped[str | None] = mapped_column(Text, nullable=True)
+    tags: Mapped[list | None] = mapped_column(JSON, nullable=True)
+    source: Mapped[str] = mapped_column(String(64), default=AIMemorySource.AUTO, index=True)
+    importance: Mapped[int] = mapped_column(Integer, default=1, index=True)
+    status: Mapped[str] = mapped_column(String(32), default=AIMemoryStatus.ACTIVE, index=True)
+    actor: Mapped[str] = mapped_column(String(128), default=ActorValue.SYSTEM, index=True)
+    last_used_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
+    expires_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True, index=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=utc_now, index=True)
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime,
+        default=utc_now,
+        onupdate=utc_now,
+    )