server: Delete all ingredients when deleting households

src/routes/household.rs

@@ -136,6 +136,10 @@ async fn delete_household(
     household: household::Model,
     txn: &DatabaseTransaction,
 ) -> Result<(), RouteError> {
+    for ingredient in household.find_related(Ingredient).all(txn).await? {
+        ingredient.delete(txn).await?;
+    }
+
     household.delete(txn).await?;
 
     Ok(())