```

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/tools/init_db.py

@@ -19,6 +19,9 @@ from app.modules.business.models import (
     WorkTask,
 )
 from app.modules.feishu.models import FeishuEventReceipt
+from app.modules.events.models import DomainEvent
+from app.modules.workflows.models import WorkflowAction, WorkflowInstance
+from app.modules.writebacks.models import OfficialWritebackRun
 
 _MODELS = [
     ApprovalRequest,
@@ -39,6 +42,10 @@ _MODELS = [
     RiskEventAction,
     LegacySyncRun,
     ReportPushRun,
+    DomainEvent,
+    WorkflowInstance,
+    WorkflowAction,
+    OfficialWritebackRun,
 ]