fix(news): restore publication flow and deduplicate dashboard friends

src/lib/services/news-cache.ts

@@ -0,0 +1,32 @@
+import "server-only";
+import { randomUUID } from "node:crypto";
+import { cached } from "@/lib/cache";
+import { logger } from "@/lib/logger";
+import { redis } from "@/lib/redis";
+
+const REVISION_KEY = "cms:news:revision";
+export async function cacheNews<T>(
+	key: string,
+	ttlMs: number,
+	query: () => Promise<T>,
+): Promise<T> {
+	if (!redis || redis.status === "end") return query();
+	let revision: string;
+	try {
+		revision = (await redis.get(REVISION_KEY)) ?? "0";
+	} catch {
+		return query();
+	}
+	return cached(`news:${revision}:${key}`, ttlMs, query);
+}
+export async function invalidateNewsCache(): Promise<void> {
+	if (!redis || redis.status === "end") return;
+	try {
+		await redis.set(REVISION_KEY, randomUUID());
+	} catch (error) {
+		logger.error("News saved but public cache invalidation failed", {
+			module: "news",
+			error,
+		});
+	}
+}