Tests cover:
- sort by vmid asc/desc
- sort by name desc
- sort by created_at asc/desc (id tiebreaker for same-second inserts)
- sort by updated_at asc/desc (id tiebreaker for same-second inserts)
- invalid sort field falls back to name asc
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
