- upsertPriceObservation: insert new observation if last one is >7 days old,
even when price (content_hash) hasn't changed — keeps timeseries data fresh
- ATGBICS: detect Shopify catalog wrap-around by tracking per-category seen URLs;
stop pagination when all products on a page were already seen in a prior page
- ATGBICS: improve hasNextPage to match &page=N anchored in href params