refactor: priority-based tool result dispatch selection #284

Job	Run time
Verify prod requirements.txt is sufficient	15s
pytest (windows-latest)	1m 56s
pytest (macos-latest)	28s
pytest (ubuntu-latest)	38s
mypy	26s
ruff + pip-audit (macos-latest)	22s
Frontend unit tests (vitest) (ubuntu-latest)	30s
Performance benchmarks (gated)	33s
Frontend unit tests (vitest) (macos-latest)	33s
Frontend unit tests (vitest) (windows-latest)	59s
API integration tests + coverage (windows-latest)	1m 10s
ruff + pip-audit (ubuntu-latest)	19s
API integration tests + coverage (macos-latest)	35s
API integration tests + coverage (ubuntu-latest)	21s
ruff + pip-audit (windows-latest)	1m 2s
	10m 7s

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