Fixed greenlet error on rollback

src/alpine_bits_python/api.py

@@ -923,6 +923,10 @@ async def handle_webhook_unified(
         )
 
         # 8. Update status and link created entities when available
+        # Re-add to session in case processor called rollback (e.g., for duplicates)
+        if webhook_request not in db_session:
+            webhook_request = await db_session.merge(webhook_request)
+
         webhook_request.status = WebhookStatus.COMPLETED
         webhook_request.processing_completed_at = datetime.now(UTC)