feat(ai): 添加 ai_analysis_queue 迁移 + Entity

异步分析队列表，支持优先级/重试/状态机（pending→running→completed/failed）
索引覆盖租户状态查询和调度扫描，迁移号 000118

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

@@ -0,0 +1,34 @@
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "ai_analysis_queue")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub patient_id: Uuid,
+    pub analysis_type: String,
+    pub priority: i32,
+    pub status: String,
+    pub source_event: Option<String>,
+    pub source_ref: String,
+    pub scheduled_at: DateTimeUtc,
+    pub started_at: Option<DateTimeUtc>,
+    pub completed_at: Option<DateTimeUtc>,
+    pub result_analysis_id: Option<Uuid>,
+    pub error_message: Option<String>,
+    pub retry_count: i32,
+    pub max_retries: i32,
+    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

@@ -1,4 +1,5 @@
 pub mod ai_analysis;
+pub mod ai_analysis_queue;
 pub mod ai_prompt;
 pub mod ai_risk_threshold;
 pub mod ai_suggestion;