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-message/src/module.rs

@@ -352,6 +352,42 @@ async fn handle_workflow_event(
                 .map_err(|e| e.to_string())?;
             }
         }
+        "appointment.reminder" => {
+            let patient_id = event
+                .payload
+                .get("patient_id")
+                .and_then(|v| v.as_str())
+                .and_then(|s| uuid::Uuid::parse_str(s).ok());
+            let appointment_date = event
+                .payload
+                .get("appointment_date")
+                .and_then(|v| v.as_str())
+                .unwrap_or("明天");
+            let time_slot = event
+                .payload
+                .get("time_slot")
+                .and_then(|v| v.as_str())
+                .unwrap_or("");
+
+            if let Some(pid) = patient_id {
+                if should_skip_for_dnd(event.tenant_id, pid, "normal", db).await {
+                    return Ok(());
+                }
+                let _ = crate::service::message_service::MessageService::send_system(
+                    event.tenant_id,
+                    pid,
+                    "预约提醒".to_string(),
+                    format!("您明天（{}）有一个预约，时间段：{}，请准时就诊。", appointment_date, time_slot),
+                    "normal",
+                    Some("appointment".to_string()),
+                    event.payload.get("appointment_id").and_then(|v| v.as_str()).and_then(|s| uuid::Uuid::parse_str(s).ok()),
+                    db,
+                    event_bus,
+                )
+                .await
+                .map_err(|e| e.to_string())?;
+            }
+        }
         "health_data.critical_alert" => {
             let patient_name = event
                 .payload