feat(ai): 添加 ai_tenant_configs 迁移 + Entity

支持租户级 Provider 路由配置、月度 Token 预算、每日患者限制
unique 索引确保每租户一条配置，迁移号 000117

crates/erp-ai/src/entity/ai_tenant_config.rs

@@ -0,0 +1,27 @@
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "ai_tenant_configs")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub default_provider: String,
+    pub fallback_provider: Option<String>,
+    pub analysis_type_overrides: Option<Json>,
+    pub monthly_token_budget: i64,
+    pub daily_patient_limit: i32,
+    pub is_enabled: bool,
+    pub created_at: DateTimeUtc,
+    pub updated_at: DateTimeUtc,
+    pub created_by: Option<Uuid>,
+    pub updated_by: Option<Uuid>,
+    pub deleted_at: Option<DateTimeUtc>,
+    pub version_lock: i32,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

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

@@ -2,4 +2,5 @@ pub mod ai_analysis;
 pub mod ai_prompt;
 pub mod ai_risk_threshold;
 pub mod ai_suggestion;
+pub mod ai_tenant_config;
 pub mod ai_usage;

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

@@ -116,6 +116,7 @@ mod m20260505_000113_create_ble_gateways;
 mod m20260505_000114_dialysis_record_add_workflow_instance;
 mod m20260505_000115_family_member_health_proxy;
 mod m20260505_000116_seed_missing_health_menus;
+mod m20260505_000117_create_ai_tenant_configs;
 
 pub struct Migrator;
 
@@ -239,6 +240,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20260505_000114_dialysis_record_add_workflow_instance::Migration),
             Box::new(m20260505_000115_family_member_health_proxy::Migration),
             Box::new(m20260505_000116_seed_missing_health_menus::Migration),
+            Box::new(m20260505_000117_create_ai_tenant_configs::Migration),
         ]
     }
 }

crates/erp-server/migration/src/m20260505_000117_create_ai_tenant_configs.rs

@@ -0,0 +1,107 @@
+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
+            .create_table(
+                Table::create()
+                    .table(AiTenantConfig::Table)
+                    .if_not_exists()
+                    .col(ColumnDef::new(AiTenantConfig::Id).uuid().not_null().primary_key())
+                    .col(ColumnDef::new(AiTenantConfig::TenantId).uuid().not_null())
+                    .col(
+                        ColumnDef::new(AiTenantConfig::DefaultProvider)
+                            .string_len(50)
+                            .not_null()
+                            .default("claude"),
+                    )
+                    .col(ColumnDef::new(AiTenantConfig::FallbackProvider).string_len(50).null())
+                    .col(ColumnDef::new(AiTenantConfig::AnalysisTypeOverrides).json().null())
+                    .col(
+                        ColumnDef::new(AiTenantConfig::MonthlyTokenBudget)
+                            .big_integer()
+                            .not_null()
+                            .default(1_000_000),
+                    )
+                    .col(
+                        ColumnDef::new(AiTenantConfig::DailyPatientLimit)
+                            .integer()
+                            .not_null()
+                            .default(50),
+                    )
+                    .col(
+                        ColumnDef::new(AiTenantConfig::IsEnabled)
+                            .boolean()
+                            .not_null()
+                            .default(true),
+                    )
+                    .col(
+                        ColumnDef::new(AiTenantConfig::CreatedAt)
+                            .timestamp_with_time_zone()
+                            .not_null()
+                            .default(Expr::current_timestamp()),
+                    )
+                    .col(
+                        ColumnDef::new(AiTenantConfig::UpdatedAt)
+                            .timestamp_with_time_zone()
+                            .not_null()
+                            .default(Expr::current_timestamp()),
+                    )
+                    .col(ColumnDef::new(AiTenantConfig::CreatedBy).uuid().null())
+                    .col(ColumnDef::new(AiTenantConfig::UpdatedBy).uuid().null())
+                    .col(ColumnDef::new(AiTenantConfig::DeletedAt).timestamp_with_time_zone().null())
+                    .col(
+                        ColumnDef::new(AiTenantConfig::VersionLock)
+                            .integer()
+                            .not_null()
+                            .default(1),
+                    )
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .if_not_exists()
+                    .unique()
+                    .name("idx_ai_tenant_configs_tenant_unique")
+                    .table(AiTenantConfig::Table)
+                    .col(AiTenantConfig::TenantId)
+                    .to_owned(),
+            )
+            .await?;
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(AiTenantConfig::Table).to_owned())
+            .await?;
+        Ok(())
+    }
+}
+
+#[derive(DeriveIden)]
+enum AiTenantConfig {
+    Table,
+    Id,
+    TenantId,
+    DefaultProvider,
+    FallbackProvider,
+    AnalysisTypeOverrides,
+    MonthlyTokenBudget,
+    DailyPatientLimit,
+    IsEnabled,
+    CreatedAt,
+    UpdatedAt,
+    CreatedBy,
+    UpdatedBy,
+    DeletedAt,
+    VersionLock,
+}