Notice: matchKey changes

Announced change to matchKey (UK Supermarket Price Scraper), 5 October 2026. Ships no earlier than 4 November 2026. Unit words in product names are written in the singular, so "2 Pints" and "2 Pint" give the same key. Pint-sized volumes are written in pints: a pack within 0.5% of a whole number of UK pints becomes <n>pt, so "2.272L", "2.27L", "2272ml" and "4 pint" all become 4pt; other sizes stay in ml and g. For one release, rows also carry matchKeyV1, the key exactly as built today, so existing joins keep working while you switch; matchKeyV1 is removed in the release after that, with its own notice. UK edition only; no other field, price or event changes.