feat(core): 事件归档 + 消费者幂等性 — 迁移 084/085 + 清理任务

- 迁移 084: domain_events_archive 归档表 + cleanup_old_published_events()
- 迁移 085: processed_events 去重表 + cleanup_old_processed_events()
- erp-core: is_event_processed() / mark_event_processed() 幂等性辅助
- erp-server: tasks::start_event_cleanup() 每 24h 归档 >90 天事件

crates/erp-server/src/main.rs

@@ -4,6 +4,7 @@ mod handlers;
 mod middleware;
 mod outbox;
 mod state;
+mod tasks;
 
 /// OpenAPI 规范定义 — 通过 utoipa derive 合并各模块 schema。
 #[derive(OpenApi)]
@@ -410,6 +411,9 @@ async fn main() -> anyhow::Result<()> {
     outbox::start_outbox_relay(db.clone(), event_bus.clone(), config.database.url.clone());
     tracing::info!("Outbox relay started");
 
+    // Start event cleanup (archive old published events + purge processed_events)
+    tasks::start_event_cleanup(db.clone());
+
     // Start timeout checker (scan overdue tasks every 60s)
     erp_workflow::WorkflowModule::start_timeout_checker(db.clone(), event_bus.clone());
     tracing::info!("Timeout checker started");

crates/erp-server/src/tasks.rs

@@ -0,0 +1,53 @@
+use std::time::Duration;
+
+/// 启动事件清理后台任务。
+///
+/// 每日执行一次：
+/// - 调用 `cleanup_old_published_events()` 归档 >90 天的已发布事件
+/// - 调用 `cleanup_old_processed_events()` 清理 >7 天的去重记录
+pub fn start_event_cleanup(db: sea_orm::DatabaseConnection) {
+    tokio::spawn(async move {
+        let mut interval = tokio::time::interval(Duration::from_secs(86400));
+        loop {
+            interval.tick().await;
+            if let Err(e) = run_cleanup(&db).await {
+                tracing::warn!(error = %e, "事件清理任务执行失败");
+            }
+        }
+    });
+    tracing::info!("事件清理任务已启动（每 24 小时执行一次）");
+}
+
+async fn run_cleanup(db: &sea_orm::DatabaseConnection) -> Result<(), sea_orm::DbErr> {
+    use sea_orm::ConnectionTrait;
+
+    // 归档 >90 天的已发布事件
+    match db
+        .execute_unprepared("SELECT cleanup_old_published_events(90, 1000)")
+        .await
+    {
+        Ok(result) => {
+            tracing::info!(
+                rows_affected = result.rows_affected(),
+                "已发布事件归档完成"
+            );
+        }
+        Err(e) => tracing::warn!(error = %e, "已发布事件归档失败"),
+    }
+
+    // 清理 >7 天的去重记录
+    match db
+        .execute_unprepared("SELECT cleanup_old_processed_events(7, 1000)")
+        .await
+    {
+        Ok(result) => {
+            tracing::info!(
+                rows_affected = result.rows_affected(),
+                "去重记录清理完成"
+            );
+        }
+        Err(e) => tracing::warn!(error = %e, "去重记录清理失败"),
+    }
+
+    Ok(())
+}