DROP INDEX IF EXISTS idx_firewall_rule_created_by;
DROP INDEX IF EXISTS idx_firewall_client_created_by;
DROP INDEX IF EXISTS idx_bgp_peer_created_by;
DROP INDEX IF EXISTS idx_module_created_by;

-- SQLite: recreate tables without column is heavy; leave columns (no-op down for v1).
-- Down migration intentionally empty for SQLite ALTER DROP COLUMN compatibility.
