[FEATURE] Cascade fe_group changes with extendToSubpages (reindex + cleanup)

[DavRet]

Summary

When a parent page’s fe_group changes and extendToSubpages=1 is set, access rules effectively change for descendants as well. This PR ensures the index reflects those changes by triggering subtree reindexing and removing stale access variants.

What this PR does

• Adds a changeSet wildcard ('*') in AbstractUpdateHandler to match “any change” of a field, because fe_group diffs are non-trivial.
• Introduces trigger extendToSubpageEnabledAndFeGroupWasChanged in DataUpdateHandler and GarbageHandler:
  • If extendToSubpages=1 and fe_group changed → enqueue reindex for descendants (subtree) and clean up outdated access variants/documents.

How to test

1. Create a small tree: parent P with extendToSubpages=1, children C1/C2 inheriting access (no local fe_group).
2. Index once so all pages are present.
3. Change P’s fe_group (e.g., add/remove a frontend group).
4. Expected: subtree pages are queued for reindex; outdated access variants/documents are removed.
   (Before this PR: descendants did not reliably reindex; stale variants remained.)

Target versions

EXT:solr 13.x (current). Backportable if maintainers agree.

Related

Fixes: #4399

[dkd-kaehm]

@DavRet
Thanks for implementing that new feature we are missing.

[dkd-kaehm]

@DavRet
Thanks for implementing that feature.

Please fix the lint errors:

See: https://github.com/TYPO3-Solr/ext-solr/actions/runs/16937555290/job/48283985144?pr=4400#step:10:75

Loaded config TYPO3 from "/home/runner/work/ext-solr/ext-solr/.php-cs-fixer.php".
   1) Classes/Domain/Index/Queue/UpdateHandler/DataUpdateHandler.php (array_indentation)
      ---------- begin diff ----------
--- /home/runner/work/ext-solr/ext-solr/Classes/Domain/Index/Queue/UpdateHandler/DataUpdateHandler.php
+++ /home/runner/work/ext-solr/ext-solr/Classes/Domain/Index/Queue/UpdateHandler/DataUpdateHandler.php
@@ -92,7 +92,7 @@
         'no_search_sub_entriesFlagWasAdded' => [
             'changeSet' => ['no_search_sub_entries' => '0'],
         ],
-         // the current page has the field "extendToSubpages" enabled and the field "fe_group" was changed
+        // the current page has the field "extendToSubpages" enabled and the field "fe_group" was changed
         'extendToSubpageEnabledAndFeGroupWasChanged' => [
             'currentState' =>  ['extendToSubpages' => '1'],
             'changeSet' => ['fe_group' => '*'],

      ----------- end diff -----------

   2) Classes/Domain/Index/Queue/UpdateHandler/AbstractUpdateHandler.php (no_whitespace_in_blank_line)
      ---------- begin diff ----------
--- /home/runner/work/ext-solr/ext-solr/Classes/Domain/Index/Queue/UpdateHandler/AbstractUpdateHandler.php
+++ /home/runner/work/ext-solr/ext-solr/Classes/Domain/Index/Queue/UpdateHandler/AbstractUpdateHandler.php
@@ -268,7 +268,7 @@
                 return true;
             }
         }
-        
+
         $diff = array_diff_assoc($triggerConfiguration['changeSet'], $changedFields);
         return empty($diff);
     }

      ----------- end diff -----------