Beat [3/4]: prepare resolvers to handle the `blockbeat` #16926

Job	Run time
Sqlc check	2m 42s
RPC and mobile compilation check	3m 14s
lint code	6m 12s
cross compilation	30m 26s
check commits	46m 56s
sample configuration check	1m 40s
run unit tests (btcd unit-cover)	19m 20s
check pinned dependencies (google.golang.org/grpc v1.59.0)	3s
run unit tests (unit tags="kvdb_etcd")	20m 30s
run macOS itest	0s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	4s
run unit tests (unit tags="kvdb_postgres")	20m 16s
run unit tests (unit tags="kvdb_sqlite")	18m 36s
check release notes updated	0s
run unit tests (btcd unit-race)	40m 7s
run ubuntu itests	0s
run unit tests (unit-module)	1m 1s
run windows itest	0s
finish	3s
	3h 31m 10s

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