fix: translation only applied on app start

* the problem was that with gettext the translations for facets
  have been only calculated on boot time.

* using lazy_gettext instead fixes that, because it calculates
  the translation at the request level

Co-authored-by: Mirek Simek <[email protected]>

invenio_records_resources/services/records/config.py

@@ -10,7 +10,7 @@
 
 """Record Service API."""
 
-from invenio_i18n import gettext as _
+from invenio_i18n import lazy_gettext as _
 from invenio_indexer.api import RecordIndexer
 from invenio_records_permissions.policies.records import RecordPermissionPolicy
 from invenio_search import RecordsSearchV2