Extend Solr search: content coverage, 14.0.2, news recency, result images

- Index the text columns of the market/solution Content Blocks and the
  vitec_items/vitec_faq_items collection children; story documents now
  include their body (inline tt_content children via
  tx_vitec_usecase_content, same per-element extraction as pages) -
  stories were indexed with subtitle and teaser only until now
- Upgrade EXT:solr 14.0.0-RC1 -> 14.0.2 final (the Solr image moved to a
  fresh volume because the configset changed; synonyms restored via REST)
- News decay with age by publication date: crdate is the import date, so
  news map datetime to created; boost function gated to news only
- Results carry `image`: processed 640px tile image per type,
  root-relative, null for pages and downloads
- Spec v1.21: 7.16 states the /_json prefix and lists `solution` in the
  type vocabulary; footer had been stuck at v1.19
- suggest-demo.html fetches through /_json after the URL swap

public/suggest-demo.html

@@ -81,7 +81,7 @@
     const val = input.value.trim();
     if (val.length < 2) { dd.classList.remove('open'); return; }
     debounceTimer = setTimeout(async () => {
-      const url = '/search?type=7384&tx_solr[queryString]=' + encodeURIComponent(val);
+      const url = '/_json/search?type=7384&tx_solr[queryString]=' + encodeURIComponent(val);
       const j = await (await fetch(url)).json();
       const terms = Object.entries(j.suggestions || {});
       dd.innerHTML = terms.map(([t, c]) =>
@@ -106,7 +106,7 @@
   // ---- Suche: GET /search?q=...&filter=...&page=... ----
   async function runSearch(q, filter, page) {
     if (!q) return;
-    const url = '/search?q=' + encodeURIComponent(q)
+    const url = '/_json/search?q=' + encodeURIComponent(q)
       + (filter ? '&filter=' + filter : '') + (page > 1 ? '&page=' + page : '');
     const json = await (await fetch(url)).json();
     const s = json.content.colPos0[0].content.search;