Nethermind 1.38.0 Adds Taiko Hardfork, Parallel Execution

Nethermind 1.38.0 released with 372 changes since 1.37.2. Adds Taiko Unzen hardfork, parallel transaction execution with Block-level Access Lists (EIP-7928), and EIP-7981, EIP-7976, EIP-4444 support. Persists FlatLayout, rejects mismatched restarts. Improves RPC correctness, EVM optimizations, and admin_* endpoints.