Reth v2.4.0 Cuts Payload Latency, Adds JIT EVM

Reth v2.4.0 cuts mean newPayload latency 6.2% vs v2.3.0. Adds experimental revmc JIT EVM via --jit.enabled flag. Networking and transaction propagation upgraded: faster pooled recovery, cached full transaction encoding, reduced ECIES/P2PStream allocations. ParallelStateRoot removed; migrate to sparse trie task. Bootnode co-locates discv4/discv5 on one UDP port.