fix(rpc): support eth_simulateV1 with flashblocks

[realmehmetali]

Summary

• remove the Flashblocks RPC panic path for eth_simulateV1
• delegate state-root configuration to the wrapped OpEthApi
• preserve the node's existing RPC configuration instead of introducing Flashblocks-specific behavior

Why

eth_simulateV1 consults compute_state_root_for_eth_simulate while serving simulations. The Flashblocks wrapper currently implements that method with unimplemented!(), so a standards-based simulation request can panic its RPC task.

Reliable simulation is especially important for automated wallets and AI agents that preflight multi-step state transitions before submitting transactions. This keeps World Chain's Flashblocks API aligned with the upstream OP-Reth implementation.

Validation

• cargo fmt --all -- --check
• cargo check -p world-chain-rpc --all-targets
• cargo test -p world-chain-rpc --lib (11 passed)

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Note

Low Risk
Single-method delegation with no new Flashblocks-specific logic; aligns behavior with the wrapped OP-Reth API.

Overview
Fixes eth_simulateV1 on the Flashblocks RPC wrapper by implementing compute_state_root_for_eth_simulate as a forward to the wrapped OpEthApi instead of unimplemented!(), which could panic the RPC task when simulations read that setting.

Behavior now matches the inner node’s RPC configuration (same pattern as max_simulate_blocks and call_gas_limit), with an #[inline] delegate added for consistency.

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