feat(catalog): prevent and repair Arcturus emulator data errors

Block invalid catalog_items writes at the API level (points currency
allowlist, non-negative prices, positive amount, limited stack >= sold
count, unique sibling order numbers) and auto-assign unique order numbers
on bulk create. Add a catalog-maintenance scan + transactional repair that
fixes pre-existing rows: resets unsupported points_type, clamps negative
costs, sets amount to 1, raises limited_stack, renumbers duplicate orders
and deletes offers with missing page/item references. Surface the issue
count and a fix button in the admin maintenance panel.

Also: add enabled/retired flag to clone sources, classify poster and
currency furniture in item-kind, and remove the obsolete update-Nitrov3.sh.

src/actions/catalog-items.ts

@@ -144,6 +144,12 @@ export async function bulkCreateCatalogItems({
 		let created = 0;
 		let failed = 0;
 
+		// Find the next order number on the target page to avoid collisions.
+		const [maxOrder] = (await db.execute(sql`
+			SELECT COALESCE(MAX(order_number), 0) AS maxOrder FROM catalog_items WHERE page_id = ${String(pageId)}
+		`)) as unknown as [{ maxOrder: number }, unknown];
+		let nextOrder = Number(maxOrder?.maxOrder ?? 0) + 1;
+
 		for (const row of rows) {
 			const base = baseMap.get(row.baseId);
 			if (!base) {
@@ -161,7 +167,7 @@ export async function bulkCreateCatalogItems({
 					amount: 1,
 					limitedSells: 0,
 					limitedStack: 0,
-					orderNumber: 1,
+					orderNumber: nextOrder++,
 					offerId: -1,
 					songId: 0,
 					haveOffer: "1",