feat(db): device_readings 新增 metric 字段用于多行拆分存储

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

@@ -11,6 +11,8 @@ pub struct Model {
     #[sea_orm(skip_serializing_if = "Option::is_none")]
     pub device_id: Option<String>,
     pub device_type: String,
+    #[sea_orm(nullable)]
+    pub metric: Option<String>,
     #[sea_orm(skip_serializing_if = "Option::is_none")]
     pub device_model: Option<String>,
     pub raw_value: serde_json::Value,

crates/erp-health/src/service/device_reading_service.rs

@@ -207,6 +207,7 @@ async fn batch_insert_readings(
             patient_id: Set(patient_id),
             device_id: Set(Some(device_id.to_string())),
             device_type: Set(r.device_type.clone()),
+            metric: Set(r.values.get("metric").and_then(|v| v.as_str()).map(String::from)),
             device_model: Set(device_model.map(String::from)),
             raw_value: Set(r.values.clone()),
             measured_at: Set(*measured_at),

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

@@ -91,6 +91,7 @@ mod m20260428_000088_rls_policy_strict;
 mod m20260428_000089_blind_indexes;
 mod m20260428_000090_critical_alerts;
 mod m20260428_000091_dead_letter_events;
+mod m20260429_000092_device_readings_metric;
 
 pub struct Migrator;
 
@@ -189,6 +190,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20260428_000089_blind_indexes::Migration),
             Box::new(m20260428_000090_critical_alerts::Migration),
             Box::new(m20260428_000091_dead_letter_events::Migration),
+            Box::new(m20260429_000092_device_readings_metric::Migration),
         ]
     }
 }

crates/erp-server/migration/src/m20260429_000092_device_readings_metric.rs

@@ -0,0 +1,48 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .alter_table(
+                Table::alter()
+                    .table(Alias::new("device_readings"))
+                    .add_column(ColumnDef::new(Alias::new("metric")).string().null())
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .name("idx_dr_metric")
+                    .table(Alias::new("device_readings"))
+                    .col(Alias::new("tenant_id"))
+                    .col(Alias::new("patient_id"))
+                    .col(Alias::new("metric"))
+                    .col(Alias::new("measured_at"))
+                    .to_owned(),
+            )
+            .await?;
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_index(Index::drop().name("idx_dr_metric").to_owned())
+            .await?;
+
+        manager
+            .alter_table(
+                Table::alter()
+                    .table(Alias::new("device_readings"))
+                    .drop_column(Alias::new("metric"))
+                    .to_owned(),
+            )
+            .await
+    }
+}