Respond to audit feedback

[kaze-cow]

Description

Implement fixes from recent audit report.

Context

We recently completed an audit. Of the three informational issues identified, this PR includes changes for two of them:

• Finding 001 49f12eb
• Finding 002 02f5f8d

Out of Scope

The audit report itself will be added to this repository once its finalized in a future PR.

Testing Instructions

[ ] Ensure the tests are still passing
[ ] Ensure the gas usage has not changed for the contract
[ ] Review the actual audit report response document/report itself, and confirm the responses are as expected.

[gemini-code-assist]

Code Review

This pull request updates the Solver7702Delegate contract to allow self-calls without value to bypass the authorization check, preventing them from reverting. Additionally, it refines the inline assembly comments in the fallback function to clarify memory overwrite behavior and introduces a new unit test to verify that self-calls succeed. There are no review comments, so I have no feedback to provide.

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[fedgiac]

The changes by themselves look good.
Linting is failing and testing is failing. The former should be fixed, the latter seems to be unrelated but should be fixed somewhere.