The samples are the ones the production database actually holds: 档口 codes
like "新寮-雅伊阁大码女装#301" and "DD#004" must be filtered, while own
codes like "PDD0582", "my238", "1" and "引流款" must not, and an empty
variationSku is a product without a supplier code rather than a 档口 item.
The test also asserts the two structural rules record different hit counts.
That is the property the previous aggregate-per-kind write could not hold,
and the disable-confirmation dialog depends on it.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NTDbDcwbDw1TSAcE6wfh2F
