refactor: priority-based tool result dispatch selection #283

Job	Run time
Frontend unit tests (vitest) (macos-latest)	25s
Frontend unit tests (vitest) (ubuntu-latest)	26s
ruff + pip-audit (windows-latest)	1m 18s
pytest (macos-latest)	30s
Verify prod requirements.txt is sufficient	9s
Frontend unit tests (vitest) (windows-latest)	1m 0s
ruff + pip-audit (macos-latest)	18s
API integration tests + coverage (macos-latest)	20s
ruff + pip-audit (ubuntu-latest)	21s
pytest (windows-latest)	1m 27s
API integration tests + coverage (windows-latest)	50s
Performance benchmarks (gated)	29s
API integration tests + coverage (ubuntu-latest)	19s
pytest (ubuntu-latest)	49s
mypy	25s
	9m 6s

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