test framework: AccountMarginSummary precompile is not implemented

[0xjuaan]

The AccountMarginSummary precompile has not yet been implemented:

hyper-evm-lib/test/simulation/hyper-core/CoreView.sol

Lines 126 to 130 in 394c759

	function readAccountMarginSummary(address user) public view returns (PrecompileLib.AccountMarginSummary memory) {
	// 1. maintain an enumerable set for the perps that a user is in
	// 2. iterate over their positions and calculate position value, add them up (value = abs(sz * markPx))
	return PrecompileLib.accountMarginSummary(0, user);
	}

[0xjuaan]

fixed in pr #15