implement attestation flow and add a test scenario

[serapath]

@todo

• implement attestation
• add scenario in the lab/ folder

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explanation
So the chain will announce to some random datdot nodes, that they should join specific hyperswarms to download/request chunks from specifically the peer which is supposed to host to see if they provide them and then report back to the chain. we want to use that opportunity to also measure throughput/latency/etc... of hosters