feat(blob): extend blob struct with index field #6760

Job	Run time
setup	1s
yamllint	5s
Markdown Lint	1m 17s
hadolint / hadolint	7s
go-ci / Setup	1s
go-ci / Go Mod Tidy Check	20s
go-ci / Lint	1m 53s
go-ci / Unit Tests Coverage (ubuntu-latest)	3m 13s
go-ci / Unit Tests Coverage (macos-latest)	6m 29s
go-ci / Integration Tests / Integration Tests API	2m 20s
go-ci / Integration Tests / Integration Tests Blob	2m 13s
go-ci / Integration Tests / Integration Tests Fraud	7m 4s
go-ci / Integration Tests / Integration Tests ND	2m 40s
go-ci / Integration Tests / Integration Tests p2p	2m 13s
go-ci / Integration Tests / Integration Tests Sync	2m 54s
go-ci / Integration Tests / Integration Tests Reconstruction	2m 15s
version_bump	0s
goreleaser	0s
	35m 5s

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