feat: CID gravity connector #452

Job	Run time
ci-lint	21s
build-2k	4m 22s
build-debug	4m 19s
build-calibnet	4m 13s
build-forest	4m 25s
build-mainnet	4m 44s
gen-check	9m 38s
gofmt	22s
lint	3m 27s
mod-tidy-check	34s
setup-params	4s
test (test-itest-curio, ./itests/curio_test.go)	6m 53s
test (test-all, `go list ./... \| grep -v curio/itests`)	2m 47s
test (test-itest-harmonyDB, ./itests/harmonydb_test.go)	3m 6s
test (test-itest-alertnow, ./itests/alertnow_test.go)	1m 40s
	50m 55s

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