Implement `blockbeat` #16865

Job	Run time
Sqlc check	30s
RPC and mobile compilation check	3m 0s
check commits	26m 52s
check pinned dependencies (google.golang.org/grpc v1.59.0)	3s
cross compilation	30m 33s
lint code	5m 53s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	4s
run macOS itest	27m 54s
check release notes updated	5s
sample configuration check	1m 28s
run ubuntu itests (btcd, backend=btcd cover=1)	18m 36s
run unit tests (btcd unit-cover)	19m 22s
run ubuntu itests (bitcoind, backend=bitcoind cover=1)	23m 37s
run windows itest	7m 28s
run unit tests (unit tags="kvdb_etcd")	21m 10s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	23m 12s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling" cover=1)	24m 0s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	32m 14s
run unit tests (unit tags="kvdb_postgres")	19m 56s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	42m 56s
run unit tests (unit tags="kvdb_sqlite")	18m 7s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	24m 6s
run unit tests (btcd unit-race)	40m 13s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	42m 2s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	24m 27s
run unit tests (unit-module)	1m 6s
run ubuntu itests (neutrino, backend=neutrino cover=1)	22m 1s
finish	3s
	8h 20m 58s

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