feat: Add more logs around the driver balance fetching

[m-lord-renkse]

Problem

The driver gets stuck fetching new balances (keeps sending outdated balances) and we do not know why it happens.

Suggested solution

Add more logs (debug/trace logs, we can enabled them on the fly) around the balance fetching in order to figure out where it fails/why it fails.

Alternatives considered

A clear and concise description of any alternative solutions or features you've considered.

Additional context

For context: In order to allow solvers to “internalize” trades (trade with settlement balances instead of an AMM). For this we query the balance of relevant tokens and put them in the auction. These balances don’t get updated anymore. I.e. the balance etherscan reports is no longer identical to the balance we send in the /solve request.

Acceptance criteria

We add more logs which potentially will allow us debug better why the balances are stuck when it happens again.

[github-actions]

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