merchantKey("Bigals Pizza") contains "iga", so GROCERY_PATTERN filed a pizza
shop as a grocer and merchantMatches matched it against every IGA on the same
date and total. Short names in a substring list collide with ordinary words,
and the collision reads as a correct classification rather than a bug.
GROCERY_PATTERN is now a word-boundary alternation; merchantMatches asks
whether one name's words appear as a contiguous run inside the other's, which
keeps Coles <-> Coles (Wyndham Vale) and Order - Coles (Wyndham Vale).
Also collapses the third PLATFORM_LABEL copy: order-ingestion's was exported
and read nowhere, order-details.tsx had its own, and the intake one — the only
live copy — was missing `uber`. One map, in intake-rules.