```

feat: 添加数据库迁移脚本并更新Dockerfile配置

- 在Dockerfile中添加alembic配置文件和目录的复制指令
- 更新alembic/env.py注册新的模块模型：events、workflows、writebacks
- 生成完整的初始数据库schema迁移脚本，包含以下表：
  - approval_requests, attendance_records, audit_logs, domain_events
  - expenses, feishu_event_receipts, fund_accounts, legacy_sync_runs
  - official_writeback_runs, performance_metrics, policies, procurements
  - projects, report_push_runs, risk_event_actions, risk_events
  - standards, suppliers, work_reports, work_tasks, workflow_actions
  - workflow_instances等21个数据表结构定义
- 在API路由器中添加新模块的路由：events、workflows、writebacks、observability
```

app/modules/risk/constants.py

@@ -59,6 +59,16 @@ class RiskEventActionKey(StrEnum):
     RISK_EVENT = "risk_event"
     ACTION_RECORD = "action_record"
     ITEMS = "items"
+    FROM_STATUS = "from_status"
+    TO_STATUS = "to_status"
+    COMMENT = "comment"
+    PAYLOAD = "payload"
+    ASSIGNED_TO = "assigned_to"
+    REVIEW_SUMMARY = "review_summary"
+
+
+class RiskErrorDetail(StrEnum):
+    RISK_EVENT_NOT_FOUND = "Risk event not found"
 
 
 RISK_SCORE_WEIGHTS = {