feat(ai): 每日风险快照批量刷新定时任务

- risk_service 新增 refresh_all_patients 方法
- module on_startup 启动每日刷新后台任务

crates/erp-ai/src/module.rs

@@ -312,6 +312,25 @@ impl ErpModule for AiModule {
         let copilot_handles = crate::event::copilot_consumer::spawn(&ctx.db, &ctx.event_bus);
         std::mem::forget(copilot_handles);
 
+        // 每日凌晨 2:00 批量刷新所有在管患者风险快照
+        let refresh_db = ctx.db.clone();
+        tokio::spawn(async move {
+            let mut interval = tokio::time::interval(std::time::Duration::from_secs(86400));
+            loop {
+                interval.tick().await;
+                match crate::service::risk_service::RiskService::refresh_all_patients(&refresh_db)
+                    .await
+                {
+                    Ok(count) => {
+                        tracing::info!(patient_count = count, "每日风险快照刷新完成");
+                    }
+                    Err(e) => {
+                        tracing::warn!(error = %e, "每日风险快照刷新失败");
+                    }
+                }
+            }
+        });
+
         tracing::info!(
             module = "ai",
             "AI 模块事件处理器已注册（监听 ai.* 事件 + Copilot 事件）"

crates/erp-ai/src/service/risk_service.rs

@@ -5,7 +5,7 @@ use crate::entity::copilot_risk_snapshots;
 use crate::entity::copilot_rules;
 use crate::provider::registry::ProviderRegistry;
 use erp_core::error::AppResult;
-use sea_orm::{ActiveModelTrait, ColumnTrait, EntityTrait, QueryFilter, Set};
+use sea_orm::{ActiveModelTrait, ColumnTrait, EntityTrait, FromQueryResult, QueryFilter, Set};
 use std::sync::Arc;
 use uuid::Uuid;
 
@@ -165,4 +165,36 @@ impl RiskService {
         let _ = db;
         Ok(serde_json::json!({}))
     }
+
+    /// 每日批量刷新所有在管患者的风险快照
+    /// 通过 raw SQL 查询患者列表（因为 erp-ai 不依赖 erp-health entity）
+    pub async fn refresh_all_patients(db: &sea_orm::DatabaseConnection) -> AppResult<u64> {
+        #[derive(sea_orm::FromQueryResult)]
+        struct PatientRow {
+            id: Uuid,
+            tenant_id: Uuid,
+        }
+
+        let patients: Vec<PatientRow> =
+            PatientRow::find_by_statement(sea_orm::Statement::from_sql_and_values(
+                sea_orm::DatabaseBackend::Postgres,
+                "SELECT id, tenant_id FROM patients WHERE deleted_at IS NULL",
+                [],
+            ))
+            .all(db)
+            .await?;
+
+        let total = patients.len() as u64;
+        for p in &patients {
+            if let Err(e) = Self::compute_risk(db, p.tenant_id, p.id).await {
+                tracing::warn!(
+                    patient_id = %p.id,
+                    tenant_id = %p.tenant_id,
+                    error = %e,
+                    "风险评分刷新失败"
+                );
+            }
+        }
+        Ok(total)
+    }
 }