List the current user's swarms (Alert Queries) from the DB API.
Arguments:
- page_size: optional page size for DB API pagination if supported.
- cursor: optional pagination cursor.
Note on swarm quality: swarm `natural_language_query_text` must be clear natural language,
precise about inclusions/exclusions from hearings, and thorough about scope
and conditions. Prefer complete sentences and examples to reduce false positives.