PHRAS-3722 : bin/console records:build-subdef (#4450)

* fix

* PHRAS-4001

* - allow to prune without building
- require --confirm to prune and build in the same time

---------
Co-authored-by: jygaulier <gaulier@alchemy.fr>

lib/classes/record/adapter.php

@@ -745,6 +745,19 @@ class record_adapter implements RecordInterface, cache_cacheableInterface
         return $this->subdefs;
     }
 
+    /**
+     * @return media_subdef[]
+     */
+    public function get_subdefs_from_db()
+    {
+        $subdefs = [];
+        foreach ($this->getMediaSubdefRepository()->findByRecordIdsAndNames([$this->getRecordId()]) as $subdef) {
+            $subdefs[$subdef->get_name()] = $subdef;
+        }
+
+        return $subdefs;
+    }
+
     /**
      * @return string[]
      */