cronjobs: add daily clearing of identity cache

* closes #2186

invenio_app_rdm/config.py

@@ -341,6 +341,12 @@ def files_rest_permission_factory(obj, action):
             )
         ],
     },
+    # Invenio communities provides some caching that has the potential to be never removed,
+    # therefore, we need a cronjob to ensure that at least once per day we clear the cache
+    "clear-cache": {
+        "task": "invenio_communities.tasks.clear_cache",
+        "schedule": timedelta(seconds=10),
+    },
 }
 """Scheduled tasks configuration (aka cronjobs)."""
 

invenio_app_rdm/tasks.py

@@ -8,6 +8,7 @@
 
 import sqlalchemy as sa
 from celery import shared_task
+from invenio_cache import current_cache
 from invenio_db import db
 from invenio_files_rest.models import FileInstance