```

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/audit/service.py

@@ -5,6 +5,7 @@ from sqlalchemy import select
 from sqlalchemy.orm import Session
 
 from app.core.pagination import bounded_limit
+from app.core.request_context import get_request_id
 from app.modules.audit.constants import AUDIT_REDACTED_VALUE, AUDIT_SENSITIVE_KEYS
 from app.modules.audit.models import AuditLog
 from app.modules.audit.schemas import AuditLogCreate
@@ -54,6 +55,7 @@ class AuditService:
             request_payload=_dump(payload.request_payload),
             response_payload=_dump(payload.response_payload),
             status=payload.status,
+            request_id=payload.request_id or get_request_id(),
         )
         self.db.add(record)
         self.db.commit()