Register the celery tasks in the entrypoints

* because they weren't registered before...

setup.cfg

@@ -61,6 +61,8 @@ invenio_base.blueprints =
     invenio_config_tuw_hacks = invenio_config_tuw.startup:blueprint
 invenio_base.api_blueprints =
     invenio_config_tuw_hacks = invenio_config_tuw.startup:blueprint
+invenio_celery.tasks =
+    invenio_app_rdm = invenio_app_rdm.tasks
 invenio_config.module =
     zzz_invenio_config_tuw = invenio_config_tuw.config
     # note: configs are loaded by invenio-config in lexicographic order of their