feat(health): 积分商城后端完整实现 (Chunk 2 V2 迭代)

- 新增 8 张数据库表: points_account/rule/transaction/product/order/checkin + offline_event/registration
- SeaORM Entity: 8 个实体，含完整 Relation 定义
- DTO: 积分规则/商品/订单/签到/线下活动请求响应类型
- Service: FIFO 积分消费、每日打卡(连续奖励)、商品兑换(QR码核销)、线下活动报名
- Handler: 16 个 API 端点 (患者端10 + 管理端6)
- 权限: health.points.list / health.points.manage
- 12个月滚动过期机制
- 审计日志全量覆盖

crates/erp-server/migration/src/lib.rs

@@ -52,6 +52,7 @@ mod m20260425_000049_widen_patient_id_number;
 mod m20260425_00050_add_doctor_name_column;
 mod m20260425_000051_dialysis_and_lab_enhance;
 mod m20260425_000052_create_ai_tables;
+mod m20260425_000053_create_points_tables;
 
 pub struct Migrator;
 
@@ -111,6 +112,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20260425_00050_add_doctor_name_column::Migration),
             Box::new(m20260425_000051_dialysis_and_lab_enhance::Migration),
             Box::new(m20260425_000052_create_ai_tables::Migration),
+            Box::new(m20260425_000053_create_points_tables::Migration),
         ]
     }
 }