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tests/run.py --jobs N; CI runs the query cases four at a time #568

Job	Run time
repo invariants	9s
build & typecheck	58s
what changed	9s
engine (csharp)	2m 56s
engine (python)	4m 19s
engine (typescript)	7m 33s
engine (java)	9m 56s
engine (javascript)	4m 44s
pack @axiomcode/code-graph	-1s
engines build on every platform	-1s
e2e on ${{ matrix.target.platform }}	0s
CI	3s
	30m 45s