def serialize_offer(row) -> dict:
    return {
        "id": str(row.id) if row.id else None,
        "inbox_id": row.inbox_id,
        "job_post_id": str(row.job_post_id) if row.job_post_id else None,
        "candidate_user_id": str(row.candidate_user_id) if row.candidate_user_id else None,
        "status": row.status,
        "base_salary": row.base_salary,
        "currency": row.currency,
        "salary_period": row.salary_period,
        "signing_bonus": row.signing_bonus,
        "annual_bonus_pct": row.annual_bonus_pct,
        "equity_units": row.equity_units,
        "equity_instrument": row.equity_instrument,
        "start_date": row.start_date.isoformat() if row.start_date else None,
        "expiry_date": row.expiry_date.isoformat() if row.expiry_date else None,
        "sent_at": row.sent_at.isoformat() if row.sent_at else None,
        "responded_at": row.responded_at.isoformat() if row.responded_at else None,
        "closed_at": row.closed_at.isoformat() if row.closed_at else None,
        "issued_by": str(row.issued_by) if row.issued_by else None,
        "created_by": str(row.created_by) if row.created_by else None,
        "created_at": row.created_at.isoformat() if row.created_at else None,
        "updated_at": row.updated_at.isoformat() if row.updated_at else None,
    }


def serialize_offer_history(row) -> dict:
    return {
        "id": str(row.id) if row.id else None,
        "offer_id": str(row.offer_id) if row.offer_id else None,
        "from_status": row.from_status,
        "to_status": row.to_status,
        "valid_from": row.valid_from.isoformat() if row.valid_from else None,
        "valid_to": row.valid_to.isoformat() if row.valid_to else None,
        "changed_by": str(row.changed_by) if row.changed_by else None,
        "actor_kind": row.actor_kind,
        "change_reason": row.change_reason,
    }