chore: fix clippy warnings on cargo update

[ogenev]

What was wrong?

Clippy check fails on the automatic weekly cargo update action: #1737

How was it fixed?

• Run cargo update manually
• Fix clippy warnings

To-Do

• Clean up commit history and use conventional commits.

[Copilot]

Pull Request Overview

This PR addresses Clippy warnings encountered during the weekly cargo update by updating format strings in log messages.

• Update format string syntax across log messages in the light-client RPC and client modules
• Replace traditional formatting placeholders with in-string interpolation

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
crates/light-client/src/rpc.rs	Updated the log message string interpolation style
crates/light-client/src/client.rs	Updated log messages to use in-string interpolation for errors and checkpoint responses

Comments suppressed due to low confidence (1)

crates/light-client/src/client.rs:417

• Consider using debug formatting (i.e. {checkpoint:?}) if the checkpoint is intended to be formatted with Debug, to preserve the original output style.

info!("external fallbacks responded with checkpoint {checkpoint}",);

[Copilot]

Consider using debug formatting (i.e. {checkpoint:?}) instead of the default display formatting if checkpoint requires Debug output, to match previous behavior.

Suggested change

	info!("external fallbacks responded with checkpoint 0x{checkpoint}",);
	info!("external fallbacks responded with checkpoint 0x{checkpoint:?}",);

[ogenev]

Here, we don't require debug output.

[KolbyML]

looks good