test: parity and input oracles #327

Job	Run time
Verify prod requirements.txt is sufficient	12s
pytest (windows-latest)	2m 1s
ruff + pip-audit (macos-latest)	25s
pytest (macos-latest)	50s
mypy	23s
pytest (ubuntu-latest)	51s
API integration tests + coverage (ubuntu-latest)	18s
Frontend unit tests (vitest) (windows-latest)	1m 2s
ruff + pip-audit (ubuntu-latest)	44s
Frontend unit tests (vitest) (macos-latest)	36s
API integration tests + coverage (macos-latest)	21s
Frontend unit tests (vitest) (ubuntu-latest)	23s
Performance benchmarks (gated)	36s
API integration tests + coverage (windows-latest)	48s
ruff + pip-audit (windows-latest)	1m 3s
	10m 33s

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