Pchain Merkle DB #1347

Job	Run time
Unit (macos-12)	5m 41s
Unit (ubuntu-20.04)	4m 36s
e2e	7m 27s
Unit (ubuntu-22.04)	4m 39s
e2e_existing_network	3m 14s
Unit (windows-2022)	10m 42s
Unit (self-hosted, linux, ARM64, focal)	1m 12s
Lint	4m 35s
Fuzz	12m 26s
Unit (self-hosted, linux, ARM64, jammy)	1m 12s
Upgrade	2m 8s
Protobuf Lint	5s
Up-to-date protobuf	17s
Up-to-date mocks	1m 58s
Up-to-date go.mod and go.sum	11s
	1h 0m 23s

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