feat(news): auto-push published news to the in-game Town Cryer News gump (2.1)

Phase 4: sync the site's published news posts into the Protocol 2.1 News gump.

- uoLinkClient.postNews / deleteNews.
- utils/newsGump.js — a STATE SYNC (not a one-shot announce leg): an article
  stays in the gump while its post is published news and is pulled when it leaves
  that state. buildArticle renders a compact gump-HTML block (centred title +
  plain-text excerpt — the gump supports only a small HTML subset) with a
  "more info" link to /site/news and an optional gump image from the
  `news_gump_image` setting. Every call is best-effort / never-throws.
- Hooked into the posts pipeline alongside the existing announce enqueue:
  syncPost on create/update/publish (fresh publish announces; edits refresh
  silently; leaving published-news pulls the article), removePost on delete.
- reassertAll() runs in uoLinkSocket.backfill on every WS (re)connect —
  reconciles the gump to our source of truth and recovers any article whose
  original live push failed (silent, so a reconnect never re-proclaims old news).

Server 185/185, swagger regenerated. Refs .plans/protocol2-integration.md (Phase 4).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server/src/utils/uoLinkSocket.js

@@ -17,6 +17,7 @@ const uoLinkConfig = require('../model/uoLinkConfig/uoLinkConfig.model')
 const uoLinkClient = require('./uoLinkClient')
 const shardIngest = require('./shardIngest')
 const shardState = require('../model/shardState/shardState.model')
+const newsGump = require('./newsGump')
 const log = require('./logger')('uo-link-socket')
 
 const BACKOFF_MIN_MS = 1000
@@ -102,6 +103,12 @@ async function backfill() {
       await shardState.setPresence(presence.data)
       log.info('snapshotted online population from /online', { count: presence.data.count })
     }
+
+    // Re-assert our published news into the in-game Town Cryer News gump. The
+    // website is the source of truth; this reconciles the gump on every
+    // (re)connect (and recovers any article whose original live push failed).
+    // Silent (announce:false) so a reconnect never re-proclaims old news.
+    await newsGump.reassertAll()
   } catch (err) {
     log.warn('backfill failed (continuing on live feed)', { message: err.message })
   }