Mario Zechner dd32f8888b [tests] Add diff output to C++ compatibility workflow
When C++ compatibility tests fail, show unified diffs between
Java and C++ output files for both JSON and SKEL formats:
- skeleton-data comparisons for both formats
- skeleton-state comparisons for both formats

This provides immediate visibility into compatibility issues
without requiring manual artifact download and comparison.
2025-07-26 01:35:18 +02:00
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