Standardizes locker codes by adding leading zeros while retaining owners and direct CSV lineage. Supports in-place changes, reset, and clean reuse of one Padded Codes Transform.

Pads locker codes in an uploaded CSV to a consistent four-character length by adding leading zeros. Creates a single structured Transform named Padded Codes directly from lockers.csv, replaces the code column in place, retains owner values, and preserves source lineage. The result remains inspectable, reusable, and downloadable. A Change request can update the existing Transform to six-character padding without duplication, while Reset removes generated results and allows a clean default rerun.