Insights spotlight: news from folders 11 + 442, source editable in the menu

- Megamenu entries with the catalog or spotlight layout get two editor
  fields, "Data source folders" (source_pages) and "Data source
  categories" (source_categories); the extension stores them, the site
  package's listener reads them from the entry row.
- ProvideInsightsSpotlight reads its news from those folders (empty =
  11 + 442; the newer posts live in 442, the query only read 11) and,
  when set, only from those categories (Insights: Blog Post + Press
  Release). Newest datetime first, three cards.
- Pages carrying the menu are tagged with the news and event tables, so
  saving such a record refreshes the menu without a cache flush.
- VITEC field descriptions via a TCA override; spec v1.31, README.

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

packages/evo_megamenu_json/README.md

@@ -117,6 +117,13 @@ final class ProvideCatalog
 `getEntry()` hands the listener the raw entry row (to tell several catalog
 entries apart), `getStage()` the content stage.
 
+**Data source fields** (catalog and spotlight entries): *Data source
+folders* (`source_pages`, comma list of page uids) and *Data source
+categories* (`source_categories`, sys_category MM with
+`tablenames = tx_evomegamenujson_entry`, `fieldname = source_categories`).
+The extension only stores them; the listener reads them from the entry row
+and decides what they mean (empty = its own default).
+
 ### Layout `pagetree`
 
 A structure panel that can never age against the site: the columns mirror
@@ -156,9 +163,13 @@ The VITEC site package ships `ProvideInsightsSpotlight`, which supplies
 }
 ```
 
-- `news`: the three latest news records (storage pid 11, type 0 - the Solr
-  convention), `link` = `/news/article/<path_segment>` per the NewsDetail
-  route enhancer, image from `fal_media` as processed 640px webp.
+- `news`: the three latest news records (type 0 - the Solr convention)
+  from the entry's *Data source folders* (empty = 11 + 442) and, when set,
+  in one of its *Data source categories*; `link` =
+  `/news/article/<path_segment>` per the NewsDetail route enhancer, image
+  from `fal_media` as processed 640px webp. Pages carrying the menu are
+  tagged with the news and event tables, so saving such a record refreshes
+  the menu.
 - `events`: the next two events (`hideonwebsite` = 0, upcoming by
   eventstart/eventend), `link` = the record's `eventurl` or the events
   page, image processed the same way.