systemic-engineer / tracer / 742c12362f812f8b2b14e5263934a831aea04f9f

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♻️ Initial library: Tracer

Generic computation trace with visual tree rendering.

- `Tracer` struct with step/input/output/nested fields
- `ok?/1`, `error?/1`, `result/1` for output inspection
- `find/2`, `reduce/3`, `root_causes/1` for tree navigation
- `Inspect` impl with depth-controlled color-coded tree rendering
- `Tracer.Nesting` for collecting traces during computation
- 49 doctests, 100% coverage

92 of 92 new or added lines in 3 files covered. (100.0%)

92 of 92 relevant lines covered (100.0%)

5.5 hits per line