feat(health): 消息推送集成 — 定时任务启动 + 预约提醒事件

- erp-server: 启动逾期随访检查(6h)、积分过期(24h)、预约提醒(1h) 定时任务
- appointment_service: 新增 send_reminders 扫描明日确认预约发送事件
- erp-message: 订阅 appointment.reminder 事件，向患者发送提醒消息

crates/erp-health/src/module.rs

@@ -62,6 +62,28 @@ impl HealthModule {
         })
     }
 
+    /// 启动预约提醒调度（每 1 小时运行一次），扫描明天有预约的患者发送提醒
+    pub fn start_appointment_reminder(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(3600));
+            loop {
+                tokio::select! {
+                    _ = interval.tick() => {
+                        match crate::service::appointment_service::send_reminders(&db, &event_bus).await {
+                            Ok(count) if count > 0 => tracing::info!(count = count, "预约提醒发送完成"),
+                            Ok(_) => {}
+                            Err(e) => tracing::warn!(error = %e, "预约提醒发送失败"),
+                        }
+                    }
+                    _ = tokio::signal::ctrl_c() => {
+                        tracing::info!("预约提醒调度任务收到关闭信号，正在停止");
+                        break;
+                    }
+                }
+            }
+        })
+    }
+
     pub fn public_routes<S>() -> Router<S>
     where
         crate::state::HealthState: axum::extract::FromRef<S>,

crates/erp-health/src/service/appointment_service.rs

@@ -547,3 +547,43 @@ pub async fn calendar_view(
 
     Ok(result)
 }
+
+/// 扫描明天有预约的患者，通过事件总线发送预约提醒
+/// 由定时任务每小时调用一次
+pub async fn send_reminders(
+    db: &sea_orm::DatabaseConnection,
+    event_bus: &erp_core::events::EventBus,
+) -> crate::error::HealthResult<usize> {
+    use chrono::{Local, NaiveDate};
+    use serde_json::json;
+
+    let tomorrow = Local::now().date_naive() + chrono::Duration::days(1);
+
+    // 查找明天所有确认状态的预约
+    let apps = appointment::Entity::find()
+        .filter(appointment::Column::AppointmentDate.eq(tomorrow))
+        .filter(appointment::Column::Status.eq("confirmed"))
+        .filter(appointment::Column::DeletedAt.is_null())
+        .all(db)
+        .await?;
+
+    let count = apps.len();
+    for app in apps {
+        event_bus.publish(
+            DomainEvent::new(
+                "appointment.reminder",
+                app.tenant_id,
+                json!({
+                    "appointment_id": app.id,
+                    "patient_id": app.patient_id,
+                    "doctor_id": app.doctor_id,
+                    "appointment_date": app.appointment_date,
+                    "time_slot": format!("{}-{}", app.start_time.format("%H:%M"), app.end_time.format("%H:%M")),
+                }),
+            ),
+            db,
+        ).await;
+    }
+
+    Ok(count)
+}