feat(rpc/node): readiness check #6691

Job	Run time
Markdown Lint	7s
yamllint	8s
setup	1s
hadolint / hadolint	7s
go-ci / Setup	1s
go-ci / Lint	2m 2s
go-ci / Go Mod Tidy Check	29s
go-ci / Unit Tests with Race Detector (ubuntu-latest)	3m 54s
go-ci / Unit Tests Coverage (ubuntu-latest)	3m 21s
go-ci / Unit Tests Coverage (macos-latest)	3m 47s
go-ci / Integration Tests / Integration Tests Blob	2m 19s
go-ci / Integration Tests / Integration Tests Fraud	2m 20s
go-ci / Integration Tests / Integration Tests API	2m 20s
go-ci / Integration Tests / Integration Tests ND	2m 21s
go-ci / Integration Tests / Integration Tests Reconstruction	2m 7s
go-ci / Integration Tests / Integration Tests p2p	2m 20s
go-ci / Integration Tests / Integration Tests Sync	2m 46s
version_bump	4s
goreleaser	0s
	30m 34s

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