refactor: let alternative server decide its own CV document path

Use this.alternativeServer.isAppMode instead of this.isAppMode
for consistency with how other methods delegate to the alternative
server. Not a bug — both always share the same mode — but removes
an implicit coupling.

Author: JanR

lib/server.ts

@@ -688,7 +688,7 @@ export class Server {
 		//   2. If the primary server fails to scan the cv document the alternative server will also very likely fail.
 		if (this.alternativeServer) {
 			await this.alternativeServer
-				.fetch(this.isAppMode ? "/api/private/scraper/scan-cv-document" : "/api/v1/scraper/scanCVDocument", {
+				.fetch(this.alternativeServer.isAppMode ? "/api/private/scraper/scan-cv-document" : "/api/v1/scraper/scanCVDocument", {
 					body,
 					method: "POST",
 				})