feat: eval harness scaffold + 1 example golden case + nightly workflo… #45

Job	Run time
Coverage	20s
Frontend Build	16s
Lint & Format	11s
Architecture (import-linter)	12s
Pre-commit	1m 1s
Unit tests	21s
Branch-protection contexts sync	12s
Commit-type sync	12s
Type Check	19s
Frontend Quality	18s
	3m 22s

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