fix: use head state's justified checkpoint as attestation source#506

tcoratger merged 4 commits intoleanEthereum:mainleanEthereum/leanSpec:mainfrom

GrapeBaBa:fix/attestation-source-use-head-state-justified-v2GrapeBaBa/leanSpec:fix/attestation-source-use-head-state-justified-v2Copy head branch name to clipboard