```

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/dashboard/service.py

@@ -3,6 +3,8 @@ from typing import Any
 from sqlalchemy import func, select
 from sqlalchemy.orm import Session
 
+from app.modules.ai_memory.constants import AIMemoryStatus
+from app.modules.ai_memory.models import AIMemoryEntry
 from app.modules.audit.models import AuditLog
 from app.modules.business.constants import DONE_STATUSES, PROJECT_CLOSED_STATUSES, StatusValue
 from app.modules.business.models import (
@@ -16,6 +18,8 @@ from app.modules.business.models import (
 from app.modules.business.service import serialize_model
 from app.modules.events.constants import EventStatus
 from app.modules.events.models import DomainEvent
+from app.modules.observability.constants import ObservabilityMetricKey
+from app.modules.observability.service import ObservabilityService
 from app.modules.reports.constants import ReportPushStatus
 from app.modules.risk.service import RiskService
 from app.modules.workflows.constants import WorkflowStatus
@@ -23,7 +27,7 @@ from app.modules.workflows.models import WorkflowInstance
 
 
 class DashboardService:
-    """Build lightweight operational dashboard data for V2."""
+    """Build lightweight operational dashboard data for V2/V3."""
 
     def __init__(self, db: Session):
         self.db = db
@@ -49,6 +53,8 @@ class DashboardService:
             WorkflowInstance,
             WorkflowInstance.status == WorkflowStatus.FAILED,
         )
+        active_ai_memory = self._count(AIMemoryEntry, AIMemoryEntry.status == AIMemoryStatus.ACTIVE)
+        heartbeat_summary = ObservabilityService(self.db).heartbeat_summary()
         latest_reports = self.db.execute(
             select(WorkReport).order_by(WorkReport.id.desc()).limit(5)
         ).scalars()
@@ -73,6 +79,8 @@ class DashboardService:
                 "failed_events": failed_events,
                 "running_workflows": running_workflows,
                 "failed_workflows": failed_workflows,
+                "active_ai_memory": active_ai_memory,
+                "stale_heartbeats": heartbeat_summary[ObservabilityMetricKey.STALE],
                 "risk_level": risk_summary["risk_level"],
                 "risk_score": float(risk_summary["risk_score"]),
             },