ComboContractsDataEntry

One streamed update entry for combo contracts data (including optional aggregated combo quote).

Field	Type	Required	Nullable	Default	Description
ComboContractPrices	dict[str, LivePrices]	Yes	Yes		Per-leg contract prices keyed by combo leg name. null when Include does not include Prices.
ComboContractGreeks	dict[str, LiveGreeks]	Yes	Yes		Per-leg contract greeks keyed by combo leg name. null when Include does not include Greeks.
ComboPrices	LivePrices	No	Yes		Aggregated combo prices across legs using provided quantities. null when Include does not include Prices.
ComboGreeks	LiveGreeks	No	Yes		Aggregated combo greeks across legs using provided quantities. null when Include does not include Greeks.