```

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/approvals/service.py

@@ -22,6 +22,13 @@ from app.modules.approvals.schemas import ApprovalCreate
 from app.modules.audit.constants import AuditAction, AuditRiskLevel, AuditSource
 from app.modules.audit.schemas import AuditLogCreate
 from app.modules.audit.service import AuditService
+from app.modules.events.constants import (
+    EventAggregateType,
+    EventPayloadKey,
+    EventSource,
+    EventType,
+)
+from app.modules.events.service import EventService
 
 
 class ApprovalService:
@@ -121,6 +128,23 @@ class ApprovalService:
                 response_payload={ApprovalPayloadKey.STATUS: ticket.status},
             )
         )
+        EventService(self.db).emit(
+            event_type=EventType.APPROVAL_DECIDED,
+            source=EventSource.APPROVAL,
+            aggregate_type=EventAggregateType.APPROVAL,
+            aggregate_id=ticket.ticket_id,
+            actor=approver,
+            payload={
+                EventPayloadKey.TICKET_ID: ticket.ticket_id,
+                EventPayloadKey.DOMAIN: ticket.domain,
+                EventPayloadKey.RECORD_ID: ticket.record_id,
+                EventPayloadKey.ACTION: ticket.action,
+                EventPayloadKey.STATUS: ticket.status,
+                EventPayloadKey.APPROVED: approved,
+                EventPayloadKey.COMMENT: comment,
+            },
+            idempotency_key=f"approval:{ticket.ticket_id}:{ticket.status}",
+        )
         return ticket
 
     def consume_for(