Publicize all UnsignedNodeAnnouncement fields.

[arik-so]

This is necessary for RGSS tests to create new announcements.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.20%. Comparing base (2c9dbb9) to head (5f2b04b).
Report is 2 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2948      +/-   ##
==========================================
+ Coverage   89.18%   89.20%   +0.02%     
==========================================
  Files         117      117              
  Lines       95541    95541              
  Branches    95541    95541              
==========================================
+ Hits        85205    85226      +21     
+ Misses       7840     7823      -17     
+ Partials     2496     2492       -4     

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[TheBlueMatt]

Simple enough, exactly what we did elsewhere. No need to burden another reviewer with this one.