Fix error when trying to smile already smiled records

[pixeldesu]

Fixes #1673

Multiple things that went wrong here:

• The scoped subquery thing never really worked (apparently), ActiveRecord never maps the as specified selects to the accessors, so they always are false (or nil)
  • This has been fixed with trying to pull the values we managed to fetch from self.attributes, because they are IN THERE.
• Reactions didn't have a scoped uniqueness validation, so we always ran into a Postgres exception with the indices.
• Not sure if just locally, but at least noticed here, for some reason User coercion sometimes fails in use cases and breaks so badly the app needs to restart?
  • Fixed this with passing IDs into the Reaction use cases now and letting the use case resolve the source user.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.86%. Comparing base (87458f4) to head (6708209).
Report is 26 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1685      +/-   ##
==========================================
+ Coverage   95.84%   95.86%   +0.01%     
==========================================
  Files         179      179              
  Lines        2770     2779       +9     
==========================================
+ Hits         2655     2664       +9     
  Misses        115      115              

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