@type t() :: %Bingex.Swap.PositionUpdate{
  average_price: float(),
  margin: float(),
  margin_mode: Bingex.Order.margin_mode(),
  position_margin: float(),
  realized_pnl: float(),
  side: Bingex.Order.position_side(),
  symbol: binary(),
  unrealized_pnl: float()
}

Position update information.

Fields:

• side (Order.position_side()): Position type (e.g., long, short).
• symbol (binary): Trading pair symbol (e.g., "BTC-USDT").
• margin (float): Initial margin allocated to the position.
• position_margin (float): Current margin assigned to the position.
• average_price (float): Average entry price of the position.
• unrealized_pnl (float): Unrealized profit or loss.
• realized_pnl (float): Realized profit or loss from position adjustments.
• margin_mode (Order.margin_mode()): Margin mode (e.g., isolated, cross).