Erigon 3.5.0 Enables Parallel Execution by Default

Erigon 3.5.0 enables parallel block execution by default via Block-STM, with Glamsterdam devnet support for EIP-7928 and EIP-7732. Full prune mode now retains 262,144 blocks per EIP-8252. Single p2p listener on port 30303 replaces per-protocol ports. Clique and Silkworm removed; enableMemory/enableReturnData replace disable flags.