feat: parallelise at hole level (#44) #103

Job	Run time
testbed (simple, simple, 8)	1s
testbed (simple, simple, 8)	3m 35s
testbed (mmaitre314/picklescan, picklescan, 8)	1s
testbed (mmaitre314/picklescan, picklescan, 8)	3m 58s
testbed (huggingface/huggingface_hub, huggingface_hub, 8)	1s
testbed (huggingface/huggingface_hub, huggingface_hub, 8)	4m 17s
testbed (tiangolo/fastapi, fastapi, 8)	1s
testbed (tiangolo/fastapi, fastapi, 8)	1s
testbed (encode/starlette, starlette, 8)	1s
testbed (encode/starlette, starlette, 8)	4m 19s
testbed (lancedb/lancedb, lancedb, 2)	1s
testbed (lancedb/lancedb, lancedb, 2)	4m 4s
testbed (lancedb/lance, lance, 2)	1s
testbed (lancedb/lance, lance, 2)	4m 13s
testbed (tkaitchuck/constrandom, constrandom, 8)	1s
testbed (tkaitchuck/constrandom, constrandom, 8)	1s
testbed (jaemk/cached, cached, 4)	1s
testbed (jaemk/cached, cached, 4)	4m 7s
testbed (smol-rs/async-executor, async-executor, 4)	1s
testbed (smol-rs/async-executor, async-executor, 4)	1s
testbed (gcanti/io-ts, io-ts, 8)	1s
testbed (gcanti/io-ts, io-ts, 8)	4m 55s
testbed (colinhacks/zod, zod, 8)	1s
testbed (colinhacks/zod, zod, 8)	4m 53s
testbed (helix-editor/helix, helix, 2)	1s
testbed (helix-editor/helix, helix, 2)	3m 54s
comment_results	0s
comment_results	0s
	42m 31s

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