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ARXML byte order detection returns incorrect endianness

ARXML byte order detection returns incorrect endianness: a task in harbor-swesmith-rl-artifacts: Harbor SWE-Smith 强化学习数据产物 (Harbor dataset). When loading ARXML files, the byte order detection logic is returning the wrong endianness for signals. Signals that should be big endian are being detected…

The task

When loading ARXML files, the byte order detection logic is returning the wrong endianness for signals. Signals that should be `big_endian` are being detected as `little_endian` and vice versa.

Part of keryszhan/harbor-swesmith-rl-artifacts.