some more refactoring

[zander-xyz]

No description provided.

[Copilot]

Pull Request Overview

This PR refactors block processing to make Block parameters const references and relocates database finalization logic. The changes improve const-correctness and move database finalization operations to a more appropriate location in the processing pipeline.

Key changes:

• Changed Block parameters from mutable references to const references in block processing functions
• Added event recording instrumentation around EVM execution
• Moved database finalization code from inside process_ethereum_block to the outer runloop_ethereum function

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
cmd/monad/runloop_monad.cpp	Updated propose_block function signature to take Block as const reference
cmd/monad/runloop_ethereum.cpp	Changed Block parameter to const reference, added performance event markers, and relocated database finalization logic

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