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)

apps/web/src/api/messages.ts

@@ -86,3 +86,13 @@ export async function sendMessage(req: SendMessageRequest) {
   );
   return data.data;
 }
+
+export interface SubscriptionUpdateReq {
+  dnd_enabled: boolean;
+  dnd_start?: string;
+  dnd_end?: string;
+}
+
+export async function updateSubscription(req: SubscriptionUpdateReq) {
+  await client.put('/message-subscriptions', req);
+}

apps/web/src/api/upload.ts

@@ -0,0 +1,16 @@
+import client from './client';
+
+export interface UploadResult {
+  url: string;
+  filename?: string;
+  size?: number;
+}
+
+export async function uploadFile(file: File): Promise<UploadResult> {
+  const formData = new FormData();
+  formData.append('file', file);
+  const { data: result } = await client.post('/upload', formData, {
+    headers: { 'Content-Type': 'multipart/form-data' },
+  });
+  return result.data;
+}