feat: CID gravity connector #471

Job	Run time
ci-lint	19s
build-forest	4m 17s
build-debug	4m 20s
build-calibnet	4m 30s
build-2k	4m 51s
build-mainnet	4m 19s
gen-check	9m 59s
gofmt	13s
lint	3m 33s
mod-tidy-check	36s
setup-params	3s
test (test-itest-curio, ./itests/curio_test.go)	6m 58s
test (test-all, `go list ./... \| grep -v curio/itests`)	2m 44s
test (test-itest-harmonyDB, ./itests/harmonydb_test.go)	3m 21s
test (test-itest-alertnow, ./itests/alertnow_test.go)	1m 42s
	51m 45s

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