models/action: Extract NewVersionOwnerAction struct

[Turbo87]

This avoids potential bugs from confusing the version_id: i32 and user_id: i32 arguments in the insert_version_owner_action() fn.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.19%. Comparing base (a1b9583) to head (5fefa61).
Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9999   +/-   ##
=======================================
  Coverage   89.19%   89.19%           
=======================================
  Files         295      295           
  Lines       30753    30749    -4     
=======================================
- Hits        27429    27426    -3     
+ Misses       3324     3323    -1     

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