refactor: try to use 'static to denote impls that don't reference argument lifetimes

[rklaehn]

Description

Try to use 'static instead of the new and somewhat weird use<> syntax to express that a function return argument does not reference any of the lifetimes of the function arguments or &self.

Breaking Changes

'static seems to be subtly different than use<> even though I don't really understand the difference.

Notes & open questions

I find 'static more clear to express that the result does not capture any lifetimes... YMMV.

Change checklist

• Self-review.
• Documentation updates following the style guide, if relevant.
• Tests if relevant.
• All breaking changes documented.
  • List all breaking changes in the above "Breaking Changes" section.
  • Open an issue or PR on any number0 repos that are affected by this breaking change. Give guidance on how the updates should be handled or do the actual updates themselves. The major ones are:
    • quic-rpc
    • iroh-gossip
    • iroh-blobs
    • dumbpipe
    • sendme

[github-actions]

Documentation for this PR has been generated and is available at: https://n0-computer.github.io/iroh/pr/3392/docs/iroh/

Last updated: 2025-07-16T09:41:25Z

[github-actions]

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Last updated for commit: c12eb70