test: add vitest coverage for tool render modules #265

Job	Run time
pytest (windows-latest)	1m 25s
ruff + pip-audit (windows-latest)	1m 3s
pytest (macos-latest)	39s
mypy	24s
ruff + pip-audit (macos-latest)	25s
API integration tests + coverage (ubuntu-latest)	18s
Verify prod requirements.txt is sufficient	12s
Frontend unit tests (vitest) (windows-latest)	1m 44s
Frontend unit tests (vitest) (macos-latest)	36s
API integration tests + coverage (macos-latest)	22s
Frontend unit tests (vitest) (ubuntu-latest)	26s
API integration tests + coverage (windows-latest)	51s
Performance benchmarks (gated)	30s
pytest (ubuntu-latest)	48s
ruff + pip-audit (ubuntu-latest)	24s
	10m 7s

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