feat(iroh-net): Log the crate version number

[flub]

Description

This adds a DEBUG-level log logging the crate version number.

Breaking Changes

None

Notes & open questions

This is not the first log message appearing, the MagicSock and a few
other pieces already have been logging by this time. Also I'm not
particularly bound to this wording. Maybe there are other things that
should be added to this line?

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/pr/2746/docs/iroh/

Last updated: 2024-09-24T13:54:59Z

[matheus23]

Did you test whether the environment variable reports the version of the crate, even if it's a deep transitive dependency?
I.e. I'd like to avoid a case where it reports version "0.1.0", if you compile "my-crate v 0.1.0" which depends on "iroh-net v 0.26.0"

[flub]

Did you test whether the environment variable reports the version of the crate, even if it's a deep transitive dependency? I.e. I'd like to avoid a case where it reports version "0.1.0", if you compile "my-crate v 0.1.0" which depends on "iroh-net v 0.26.0"

Pretty sure that's fine: https://doc.rust-lang.org/cargo/reference/environment-variables.html