fix(net): Clean up licensing, closure move, log typos, tracing spans

[teor2345]

Motivation

A bunch of minor zebra-network cleanups.

Solution

• Make licensing notes consistent
• Delete redundant move in closures
• Fix a log typo
• Add some missing tracing spans

Review

This is a low priority fix, @arya2 asked for some of these.

Reviewer Checklist

• Are the PR labels correct?
• Does the code do what the ticket and PR says?
  • Does it change concurrent code, unsafe code, or consensus rules?
• How do you know it works? Does it have tests?

[codecov]

Codecov Report

Merging #6995 (1247b9e) into main (73ce8fb) will decrease coverage by 0.10%.
The diff coverage is 15.87%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6995      +/-   ##
==========================================
- Coverage   77.55%   77.45%   -0.10%     
==========================================
  Files         310      310              
  Lines       41582    41609      +27     
==========================================
- Hits        32248    32228      -20     
- Misses       9334     9381      +47