feat(infra): transactional outbox — OutboxWriter port, PgOutboxWriter, OutboxRelay, TestOutbox; update create_thought + delete_thought

crates/worker/src/main.rs

@@ -1,6 +1,7 @@
 mod dlq;
 mod factory;
 mod handlers;
+mod outbox_relay;
 
 use domain::ports::EventConsumer;
 use futures::StreamExt;
@@ -26,6 +27,16 @@ async fn main() {
         infra.event_publisher.clone(),
     ));
 
+    // Spawn outbox relay — polls DB for undelivered events and publishes them.
+    tokio::spawn(
+        outbox_relay::OutboxRelay {
+            pool: infra.pool.clone(),
+            publisher: infra.event_publisher.clone(),
+            poll_interval: std::time::Duration::from_secs(5),
+        }
+        .run(),
+    );
+
     tracing::info!("Worker started, consuming events...");
     let mut stream = infra.consumer.consume();
     while let Some(result) = stream.next().await {