Resolve Missing Sizes
Listings on the chosen storefront with no seed.bottle_size metafield —
asked of Shopify directly, not inferred from Trellis. Each row is matched back to its SKU and
product data job, and to what Linnworks holds for the same wine. Setting a size writes it to the
shared SKU and pushes only the size to Shopify and Linnworks; no other field is touched.