feat(health): 透析方案管理 CRUD — dialysis_prescription 全栈

新增透析方案实体和完整 CRUD：
- Entity: 20 字段含抗凝/血管通路/透析参数
- DTO: f64 类型适配 utoipa ToSchema
- Service: 抗凝类型 + 血管通路类型校验
- Handler: 5 端点 + RBAC 权限控制
- 路由: /api/v1/health/dialysis-prescriptions

crates/erp-health/src/entity/dialysis_prescription.rs

@@ -0,0 +1,77 @@
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "dialysis_prescription")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub patient_id: Uuid,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub dialyzer_model: Option<String>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub membrane_area: Option<Decimal>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub dialysate_potassium: Option<Decimal>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub dialysate_calcium: Option<Decimal>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub dialysate_bicarbonate: Option<Decimal>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub anticoagulation_type: Option<String>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub anticoagulation_dose: Option<String>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub target_ultrafiltration_ml: Option<i32>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub target_dry_weight: Option<Decimal>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub blood_flow_rate: Option<i32>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub dialysate_flow_rate: Option<i32>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub frequency_per_week: Option<i32>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub duration_minutes: Option<i32>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub vascular_access_type: Option<String>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub vascular_access_location: Option<String>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub effective_from: Option<chrono::NaiveDate>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub effective_to: Option<chrono::NaiveDate>,
+    pub status: String,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub prescribed_by: Option<Uuid>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub notes: Option<String>,
+    pub created_at: DateTimeUtc,
+    pub updated_at: DateTimeUtc,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub created_by: Option<Uuid>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub updated_by: Option<Uuid>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub deleted_at: Option<DateTimeUtc>,
+    pub version: i32,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::patient::Entity",
+        from = "Column::PatientId",
+        to = "super::patient::Column::Id"
+    )]
+    Patient,
+}
+
+impl Related<super::patient::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Patient.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/erp-health/src/entity/mod.rs

@@ -13,6 +13,7 @@ pub mod consultation_session;
 pub mod daily_monitoring;
 pub mod device_readings;
 pub mod diagnosis;
+pub mod dialysis_prescription;
 pub mod dialysis_record;
 pub mod doctor_profile;
 pub mod doctor_schedule;