fix in the product import

main.go

@@ -78,6 +78,30 @@ func main() {
 		log.Println("⚠️  could not add products.productimages, extra photos will not be stored:", err)
 	}
 
+	// When a product became visible to a store, and the only thing that decides
+	// whether it is.
+	//
+	// `productlocations.status` cannot do this job and was never able to:
+	// syncProductLocationStatus overwrites it with 'available'/'outofstock' on
+	// every stock movement, so the 'Draft' the import wrote survived on exactly
+	// one row out of 6,755. A separate column is untouched by that, and "when
+	// was this published" is worth knowing regardless.
+	//
+	// The backfill is not optional and must land in the same deploy. Membership
+	// of a store catalogue is currently the *existence* of the row, so switching
+	// the read to `publishedat IS NOT NULL` without this empties every shop on
+	// the platform at once.
+	if err := db.DB.Exec(
+		`ALTER TABLE productlocations ADD COLUMN IF NOT EXISTS publishedat timestamp`).Error; err != nil {
+		log.Fatal("could not add productlocations.publishedat:", err)
+	}
+	if err := db.DB.Exec(`
+		UPDATE productlocations
+		SET publishedat = COALESCE(created, NOW())
+		WHERE publishedat IS NULL`).Error; err != nil {
+		log.Fatal("could not backfill productlocations.publishedat:", err)
+	}
+
 	f := facade.NewFacade(db.DB, db.CatalogueDB)
 
 	routes.RegisterRoutes(app, f)