fix(health): 数据完整性 + 代码规范修复 — FK约束/版本类型统一/软删除过滤

数据完整性:
- 新增 8 个 FK 约束 (follow_up_task→appointment, points_transaction→account/rule/order,
  points_order→product/patient, offline_event_registration→event/patient)
- critical_alert/critical_alert_response version 字段 i64→i32 统一
- vital_signs_daily_service 聚合查询添加 DeletedAt.is_null() 过滤

代码规范:
- 新增 api/upload.ts 封装文件上传，ArticleEditor 改用 service 层
- 新增 messages.updateSubscription，NotificationPreferences 改用 service 层
- 修复 erp-message SSE 测试编译错误 (移除 serde_urlencoded 依赖)

crates/erp-health/src/entity/critical_alert.rs

@@ -27,7 +27,7 @@ pub struct Model {
     pub updated_by: Option<Uuid>,
     #[sea_orm(skip_serializing_if = "Option::is_none")]
     pub deleted_at: Option<DateTimeUtc>,
-    pub version: i64,
+    pub version: i32,
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]

crates/erp-health/src/entity/critical_alert_response.rs

@@ -20,7 +20,7 @@ pub struct Model {
     pub updated_by: Option<Uuid>,
     #[sea_orm(skip_serializing_if = "Option::is_none")]
     pub deleted_at: Option<DateTimeUtc>,
-    pub version: i64,
+    pub version: i32,
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]