fix: quarantine failed product cleanups in failed_cleanup state

backend/service/product_archive_service.py

@@ -21,7 +21,7 @@ from .schemas import ProductVersionRecord
 
 
 class ProductPendingCleanupError(ValueError):
-    """Raised when a soft-deleted product is changed before restoration."""
+    """Raised when a pending or failed-cleanup product is changed before recovery."""
 
 
 class ProductArchiveService:
@@ -83,7 +83,7 @@ class ProductArchiveService:
         if not isinstance(document, dict):
             raise ValueError("document must be a JSON object")
         product = self.store.get_product(product_id)
-        if product.status == "pending_cleanup":
+        if product.status in ("pending_cleanup", "failed_cleanup"):
             raise ProductPendingCleanupError("product is pending cleanup")
         if product.status != "active":
             raise ValueError("product is not active")