feat: event ids, outbox identity migration

crates/adapters/sqlite/src/shared.rs

@@ -10,6 +10,28 @@ use domain::{
     },
 };
 
+/// THE outbox write path: inserts one `event_queue` row per event, each with a
+/// fresh `EventId`, inside the caller's transaction so a change and the events
+/// announcing it commit or roll back together.
+pub(crate) async fn enqueue_events(
+    tx: &mut sqlx::Transaction<'_, sqlx::Sqlite>,
+    events: &[domain::events::DomainEvent],
+) -> Result<(), DomainError> {
+    for event in events {
+        let payload = event_payload::EventPayload::from(event);
+        let payload_json = serde_json::to_string(&payload)
+            .map_err(|e| DomainError::InfrastructureError(format!("serialize: {e}")))?;
+        sqlx::query("INSERT INTO event_queue (event_type, payload, event_id) VALUES (?, ?, ?)")
+            .bind(payload.event_type())
+            .bind(payload_json)
+            .bind(domain::events::EventId::new().value().to_string())
+            .execute(&mut **tx)
+            .await
+            .map_err(|e| DomainError::InfrastructureError(format!("insert event: {e}")))?;
+    }
+    Ok(())
+}
+
 pub(crate) fn map_sqlx_error(e: sqlx::Error) -> DomainError {
     tracing::error!("Database error: {:?}", e);
     DomainError::InfrastructureError("Database operation failed".into())