ALTER TABLE vehicle_reconciliation_issue
    ADD COLUMN assignee VARCHAR(128) NOT NULL DEFAULT '' AFTER resolved_by,
    ADD COLUMN assigned_by VARCHAR(128) NOT NULL DEFAULT '' AFTER assignee,
    ADD COLUMN assigned_at DATETIME(3) NULL AFTER assigned_by,
    ADD COLUMN due_at DATETIME(3) NULL AFTER assigned_at,
    ADD INDEX idx_reconciliation_owner (assignee, status, due_at),
    ADD INDEX idx_reconciliation_due (due_at, status);