fix(alerts): cast Prime tier as number to fix filtering

[sogehige]

FIxes https://discord.com/channels/317348946144002050/317349069024395264/801277941568372746

CHECKLIST

• I read contributing docs

[codecov]

Codecov Report

Merging #4558 (ea48463) into master (45fa82a) will increase coverage by 0.39%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4558      +/-   ##
==========================================
+ Coverage   58.23%   58.62%   +0.39%     
==========================================
  Files         257      257              
  Lines       15294    15294              
  Branches     2954     2954              
==========================================
+ Hits         8906     8966      +60     
+ Misses       6388     6328      -60     

Flag	Coverage Δ
mysql	58.17% <ø> (+0.05%)	⬆️
postgres	58.50% <ø> (+0.40%)	⬆️
sqlite	57.62% <ø> (-0.27%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/bot/systems/points.ts	73.24% <0.00%> (+7.69%)	⬆️
src/bot/helpers/permissions/cache.ts	100.00% <0.00%> (+8.00%)	⬆️
src/bot/systems/levels.ts	62.30% <0.00%> (+11.11%)	⬆️
...elpers/permissions/recacheOnlineUsersPermission.ts	93.33% <0.00%> (+23.33%)	⬆️

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