News: Cache-Buster für Bild-URLs, HEAD, Limiter-Feinschliff

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

server/services/newsPosts.js

@@ -191,7 +191,9 @@ export async function publicPage(projectId, page, now = new Date()) {
   const slice = hanging.slice((n - 1) * PAGE_SIZE, n * PAGE_SIZE)
   const posts = []
   for (const p of slice) {
-    const image = p.imageId ? await readNewsImageMeta(projectId, p.imageId) : null
+    const meta = p.imageId ? await readNewsImageMeta(projectId, p.imageId) : null
+    // v (Zeitstempel der letzten Aenderung) dient der Route als Cache-Buster fuer die Bild-URL
+    const image = meta ? { ...meta, v: Date.parse(p.updatedAt || p.visibleFrom) } : null
     posts.push({ id: p.$id, type: p.type, title: p.title, text: p.text, paper: p.paper, date: berlinDay(p.visibleFrom), image })
   }
   return { posts, hasMore: hanging.length > n * PAGE_SIZE }