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tcoratger
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zclawz
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…nstead of SignatureKey (closes #636) Implements leanEthereum/leanSpec#436: - Replace SignatureKey(validator_id, data_root) -> StoredSignature map with AttestationData -> HashMap(ValidatorIndex, StoredSignature) (SignaturesMap) - Replace SignatureKey -> AggregatedPayloadsList map with AttestationData -> AggregatedPayloadsList (AggregatedPayloadsMap) - Remove attestation_data_by_root reverse-lookup map (no longer needed) - Remove SignatureKey type (replaced by AttestationData as key) - Update computeAggregatedSignatures Phase 1 to look up by AttestationData - Update computeAggregatedSignatures Phase 2 greedy set-cover to use per-data candidate list instead of per-validator lookup - Update pruneStaleAttestationData to iterate gossip_signatures directly and prune by target.slot (renamed to prunePayloadMapBySlot) - Update all call sites: forkchoice.zig, fork_choice_runner.zig, mock.zig, block_signatures_testing.zig
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