-- Missing historical authority is deliberately not inferred from current state.
ALTER TABLE gui_publications ADD COLUMN computer_authority JSONB;
-- Keep obsolete history out of the current-assignment candidate lookup. The
-- worker still revalidates authorization after claiming, before any RPC.
CREATE INDEX gui_publication_current_claim
ON gui_publications(computer_id,bot_id,(request->'claim'))
WHERE status='pending' AND owner_user_id IS NOT NULL AND owner_space_id IS NOT NULL AND computer_authority IS NOT NULL;
CREATE INDEX gui_publication_unexpired
ON gui_publications(((request->>'lease_expires_at_ms')::BIGINT))
WHERE status='pending' AND owner_user_id IS NOT NULL AND owner_space_id IS NOT NULL AND computer_authority IS NOT NULL;