feat(health): 新增 critical_alerts + critical_alert_responses 表 + Entity

危急值告警数据模型：status(pending/acknowledged/resolved/escalated)、
escalation_level 分级升级、乐观锁、软删除。

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

@@ -0,0 +1,49 @@
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "critical_alerts")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub patient_id: Uuid,
+    pub alert_type: String,
+    pub metric_name: String,
+    pub metric_value: String,
+    pub threshold_value: String,
+    pub severity: String,
+    pub status: String,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub acknowledged_by: Option<Uuid>,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub acknowledged_at: Option<DateTimeUtc>,
+    pub escalation_level: i32,
+    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: i64,
+}
+
+#[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/critical_alert_response.rs

@@ -0,0 +1,42 @@
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "critical_alert_responses")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub alert_id: Uuid,
+    pub responder_id: Uuid,
+    pub response_type: String,
+    #[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: i64,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::critical_alert::Entity",
+        from = "Column::AlertId",
+        to = "super::critical_alert::Column::Id"
+    )]
+    CriticalAlert,
+}
+
+impl Related<super::critical_alert::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::CriticalAlert.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}

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

@@ -11,6 +11,8 @@ pub mod critical_value_threshold;
 pub mod consent;
 pub mod consultation_message;
 pub mod consultation_session;
+pub mod critical_alert;
+pub mod critical_alert_response;
 pub mod daily_monitoring;
 pub mod device_readings;
 pub mod diagnosis;