change(scan): Use the on-disk database for keys and results #388

Job	Run time
Generate crates matrix	10s
Check crates matrix	2s
Build tower-batch-control crate	12m 49s
Build tower-fallback crate	1m 6s
Build zebra-chain crate	4m 41s
Build zebra-consensus crate	16m 9s
Build zebra-network crate	6m 39s
Build zebra-node-services crate	3m 8s
Build zebra-rpc crate	17m 1s
Build zebra-scan crate	13m 22s
Build zebra-script crate	4m 8s
Build zebra-state crate	16m 27s
Build zebra-test crate	1m 37s
Build zebra-utils crate	19m 37s
Build zebrad crate	31m 50s
Open or update issues for building crates individually failures	0s
	2h 28m 46s

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