Add Graph::trace_assertion_failure and fix duplicate error_message sy… #36

Job	Run time
Build with Compute (binary) on iOS (macos-15, 16.4, 18.5)	58s
Build with Compute (binary) on macOS (macos-15, 16.4)	28s
Build with Compute (source) on Ubuntu (6.2)	1m 16s
	2m 42s

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