docs: contributor onboarding path and CODEOWNERS (#133) #308

Job	Run time
ruff + pip-audit (macos-latest)	21s
ruff + pip-audit (ubuntu-latest)	25s
mypy	20s
pytest (macos-latest)	30s
pytest (windows-latest)	1m 28s
API integration tests + coverage (ubuntu-latest)	24s
Performance benchmarks (gated)	33s
Frontend unit tests (vitest) (windows-latest)	1m 11s
Frontend unit tests (vitest) (macos-latest)	39s
API integration tests + coverage (macos-latest)	21s
ruff + pip-audit (windows-latest)	1m 3s
pytest (ubuntu-latest)	50s
Verify prod requirements.txt is sufficient	10s
Frontend unit tests (vitest) (ubuntu-latest)	30s
API integration tests + coverage (windows-latest)	41s
	9m 26s

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