fix: truncate furniture-line slug to fit caption_save varchar(25)

Line pages used caption_save 'imp_line_<slug>' which could exceed the
25-char column limit (e.g. imp_line_pixel_collectible = 26 chars),
causing the INSERT to fail. Cap the slug at 16 chars.

src/lib/services/catalog-repair.ts

@@ -506,12 +506,14 @@ export async function organizeCatalogAll(): Promise<OrganizeCatalogResult> {
 		const base = classname.split("*")[0];
 		return (base && furnilineByClass.get(base)) || "";
 	};
+	// The `caption_save` column is varchar(25). The line prefix `imp_line_`
+	// takes 9 chars, so the slug may be at most 16 chars to stay within limit.
 	const slug = (value: string): string =>
 		value
 			.toLowerCase()
 			.replace(/[^a-z0-9]+/g, "_")
 			.replace(/^_+|_+$/g, "")
-			.slice(0, 40);
+			.slice(0, 16);
 
 	// Minimum number of items a furniture line must have before it gets its own
 	// dedicated catalog page. Lines below this threshold (one-off customs, etc.)