feat: traceback integration

[flying-sheep]

Fixes #1066

TODO: figure out how to do eyre support. color-eyre and stable-eyre have backtraces, but adding all that would add a bunch of features, so I’d welcome some guidance.

[davidhewitt]

Oooh thanks, interesting!

[codspeed]

Merging this PR will degrade performance by 18.12%

❌ 4 regressed benchmarks
✅ 137 untouched benchmarks
⏩ 6 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
❌	into_u128_small	820.5 ns	1,095.5 ns	-25.1%
❌	into_u128_zero	816 ns	1,035.5 ns	-21.19%
❌	into_i128_small_pos	932.8 ns	1,096.7 ns	-14.94%
❌	into_i128_zero	928.3 ns	1,036.6 ns	-10.45%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing flying-sheep:traceback (ebea22f) with main (74d16b0)}

Footnotes

1. 6 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[flying-sheep]

All done. What I didn’t do is integrate anyhow’s “context” in some way, as I’m not sure how that would look like.