p2p/sentry, node/eth: EIP-8159 eth/71 BAL fetcher + background downloader (PR 3/3)#20795

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mh0lt wants to merge 6 commits intomainfrom

feat/eip-8159/fetcher-downloader

Commits on Apr 28, 2026

p2p/sentry/sentry_multi_client: wire eth/71 server side (EIP-8159 Phase 5a)

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p2p/sentry/sentry_multi_client: add BALFetcher primitive (EIP-8159 Phase 5b.1)

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claude
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p2p/sentry, node/eth: background BAL downloader (EIP-8159 Phase 5c)

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node/nodecfg: add ETH71 to default P2P protocol version list

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claude/skills: add launch-bal-devnet-3 skill

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p2p/sentry: align eth/71 BAL fetcher decode with EIP-8159 update (#11553)

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