```

refactor: 移除审批和回写功能模块

移除了整个审批(approvals)和官方回写(writebacks)功能模块，
包括相关模型、路由、服务和配置项。更新了数据库迁移文件，
删除了相关的审批请求表和官方回写运行表。同时从API路由器中
移除了相应的路由，并调整了安全常量和字段验证器以匹配变更。
```

app/modules/reports/schemas.py

@@ -26,5 +26,5 @@ class WorkReportGenerateRequest(BaseModel):
     project_code: str | None = None
     period_start: date | None = None
     period_end: date | None = None
-    persist: bool = True
+    persist: bool = False
     actor: str = ActorValue.API