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/furni-maintenance.ts

@@ -11,6 +11,7 @@ import { withCatalogExport } from "@/lib/services/catalog-git-queue";
 import type {
 	AlignResult,
 	DedupResult,
+	FixEmulatorResult,
 	FixOfferResult,
 	FixSpriteResult,
 	FurniHealth,
@@ -60,6 +61,19 @@ export async function fixCatalogOffersAction(): Promise<
 	}
 }
 
+export async function fixEmulatorIssuesAction(): Promise<
+	ActionResult<FixEmulatorResult>
+> {
+	try {
+		await guard();
+		return await withCatalogExport(async () => {
+			return actionOk(await maintenance.fixEmulatorIssues());
+		});
+	} catch (e) {
+		return handleActionError(e);
+	}
+}
+
 export async function reconcileIdsAction(): Promise<
 	ActionResult<ReconcileResult>
 > {