Convert space-separated SKU names in an uploaded CSV into hyphenated slugs in place, preserving every other column. The separator can be changed to underscores, and the structured transform can be reset and recreated cleanly.

A reusable CSV transformation model that converts spaces in SKU names into separators within the existing `sku` column. By default, it creates hyphenated slugs such as `blue-mug` and `large-green-bag`, while values without spaces remain unchanged and all other columns, including `stock`, are retained. The transformation maintains direct lineage to the source CSV and supports changing the separator to underscores. Repeated runs reuse the existing transform, while reset removes generated results without deleting the source or model structure.