test: add Hypothesis fuzz coverage and macos-latest CI matrix #154

Job	Run time
API integration tests + coverage (macos-latest)	17s
Frontend unit tests (vitest) (windows-latest)	37s
pytest (ubuntu-latest)	41s
mypy	21s
Frontend unit tests (vitest) (ubuntu-latest)	15s
Frontend unit tests (vitest) (macos-latest)	20s
pytest (windows-latest)	1m 35s
API integration tests + coverage (ubuntu-latest)	21s
API integration tests + coverage (windows-latest)	50s
ruff + pip-audit (windows-latest)	1m 6s
Verify prod requirements.txt is sufficient	9s
pytest (macos-latest)	31s
ruff + pip-audit (macos-latest)	21s
ruff + pip-audit (ubuntu-latest)	22s
	7m 46s

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