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/lib/services/item-kind.test.ts

@@ -48,6 +48,16 @@ describe("classifyCatalogItem", () => {
 		expect(item({ item_name: "post_it" })).toBe("sticky");
 		expect(item({ item_name: "postit" })).toBe("sticky");
 	});
+	it("classifies posters and currency furniture", () => {
+		expect(item({ item_name: "poster100" })).toBe("poster");
+		expect(item({ item_name: "poster5000" })).toBe("poster");
+		expect(item({ item_name: "funtastic_four_poster" })).toBe("poster");
+		expect(item({ item_name: "duckfountain" })).toBe("poster");
+		expect(item({ item_name: "Swimming" })).toBe("poster");
+		expect(item({ item_name: "CF_50000_Hucci" })).toBe("currency");
+		expect(item({ item_name: "DF_102_10_bluechip" })).toBe("currency");
+		expect(item({ item_name: "sofa" })).toBe("furni");
+	});
 	it("classifies everything else as furni", () => {
 		expect(item({})).toBe("furni");
 	});