chore: clippy fixes

[Frando]

Description

• Fixes for clippy 1.89
• Quite a few methods in the ranger::Store trait are unused outside of tests. This fixes this partially. The trait was used more before we made the redb store the only store (and the "memory" store now is the "fs" store with the in-memory redb backend). This should be revisited properly, i.e. actually remove the things that are not needed anymore.

Breaking Changes

Notes & open questions

Change checklist

• Self-review.
• Documentation updates following the style guide, if relevant.
• Tests if relevant.
• All breaking changes documented.

[github-actions]

Documentation for this PR has been generated and is available at: https://n0-computer.github.io/iroh-docs/pr/54/docs/iroh_docs/

Last updated: 2025-08-11T10:22:59Z

[matheus23]

Includes #52

I think I'd prefer if we gave the contributor a chance to contribute :D
(We can probably just merge their PR before this one)