```

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/business/routes.py

@@ -4,10 +4,10 @@ from sqlalchemy.orm import Session
 
 from app.core.database import get_db
 from app.core.masking import mask_configured
-from app.core.security import ApiPrincipal, require_api_key
+from app.core.security import require_api_key
 from app.modules.business.constants import BusinessField, BusinessResponseKey
 from app.modules.business.registry import supported_domain_values
-from app.modules.business.schemas import DomainListRead, DomainRecordCreate, DomainRecordUpdate
+from app.modules.business.schemas import DomainListRead
 from app.modules.business.service import BusinessService
 
 router = APIRouter(dependencies=[Depends(require_api_key)])
@@ -53,49 +53,3 @@ def get_record(
         }
     except KeyError as exc:
         raise HTTPException(status_code=http_status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
-
-
-@router.post("/{domain}")
-def create_record(
-    domain: str,
-    payload: DomainRecordCreate,
-    db: Session = Depends(get_db),
-    principal: ApiPrincipal = Depends(require_api_key),
-) -> dict:
-    try:
-        data = BusinessService(db).create_record(
-            domain,
-            payload.data,
-            principal.actor,
-            payload.approval_ticket_id,
-        )
-    except KeyError as exc:
-        raise HTTPException(status_code=http_status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
-    return {
-        BusinessResponseKey.DOMAIN: domain,
-        BusinessResponseKey.DATA: mask_configured(data, domain=domain),
-    }
-
-
-@router.patch("/{domain}/{record_id}")
-def update_record(
-    domain: str,
-    record_id: int,
-    payload: DomainRecordUpdate,
-    db: Session = Depends(get_db),
-    principal: ApiPrincipal = Depends(require_api_key),
-) -> dict:
-    try:
-        data = BusinessService(db).update_record(
-            domain,
-            record_id,
-            payload.data,
-            actor=principal.actor,
-            approval_ticket_id=payload.approval_ticket_id,
-        )
-    except KeyError as exc:
-        raise HTTPException(status_code=http_status.HTTP_404_NOT_FOUND, detail=str(exc)) from exc
-    return {
-        BusinessResponseKey.DOMAIN: domain,
-        BusinessResponseKey.DATA: mask_configured(data, domain=domain),
-    }