feat: CID gravity connector #473

Job	Run time
ci-lint	15s
build-2k	4m 41s
build-calibnet	4m 17s
build-forest	4m 18s
build-debug	4m 46s
build-mainnet	4m 22s
gen-check	10m 2s
gofmt	14s
lint	3m 32s
mod-tidy-check	28s
setup-params	4s
test (test-itest-curio, ./itests/curio_test.go)	7m 8s
test (test-all, `go list ./... \| grep -v curio/itests`)	3m 19s
test (test-itest-harmonyDB, ./itests/harmonydb_test.go)	2m 39s
test (test-itest-alertnow, ./itests/alertnow_test.go)	1m 44s
	51m 49s

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