refactor(health): 集中管理事件类型常量 + 积分过期发布事件

- event.rs 新增 20 个事件类型常量（PATIENT_CREATED 等）
- 10 个 service 文件引用常量替代硬编码字符串
- expire_points 增加 EventBus 参数，处理完成后发布 points.expired 事件
- start_points_expiration_checker 传入 EventBus

crates/erp-health/src/module.rs

@@ -41,13 +41,13 @@ impl HealthModule {
     }
 
     /// 启动积分过期清理（每 24 小时运行一次），返回 JoinHandle 用于优雅关闭
-    pub fn start_points_expiration_checker(db: sea_orm::DatabaseConnection) -> tokio::task::JoinHandle<()> {
+    pub fn start_points_expiration_checker(db: sea_orm::DatabaseConnection, event_bus: erp_core::events::EventBus) -> tokio::task::JoinHandle<()> {
         tokio::spawn(async move {
             let mut interval = tokio::time::interval(std::time::Duration::from_secs(24 * 3600));
             loop {
                 tokio::select! {
                     _ = interval.tick() => {
-                        match crate::service::points_service::expire_points(&db).await {
+                        match crate::service::points_service::expire_points(&db, &event_bus).await {
                             Ok(count) if count > 0 => tracing::info!(count = count, "积分过期清理完成"),
                             Ok(_) => {}
                             Err(e) => tracing::warn!(error = %e, "积分过期清理失败"),
@@ -641,15 +641,16 @@ impl ErpModule for HealthModule {
         // 启动积分过期清理（启动时执行一次 + 每 24 小时重复）
         {
             let db = ctx.db.clone();
+            let event_bus = ctx.event_bus.clone();
             tokio::spawn(async move {
-                match crate::service::points_service::expire_points(&db).await {
+                match crate::service::points_service::expire_points(&db, &event_bus).await {
                     Ok(count) if count > 0 => tracing::info!(count = count, "启动时积分过期清理完成"),
                     Ok(_) => tracing::info!("启动时积分过期清理完成（无过期积分）"),
                     Err(e) => tracing::warn!(error = %e, "启动时积分过期清理失败"),
                 }
             });
         }
-        let _expire_handle = Self::start_points_expiration_checker(ctx.db.clone());
+        let _expire_handle = Self::start_points_expiration_checker(ctx.db.clone(), ctx.event_bus.clone());
         tracing::info!(module = "health", "Points expiration checker started");
 
         Ok(())