fix: map received applied_tags to int

[Dorukyum]

Summary

Solves an issue where Thread.applied_tags returns an empty list no matter how many tags are applied because the IDs stored are of different variable types.

Information

• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed).
• This PR is not a code change (e.g. documentation, README, typehinting,
  examples, ...).

Checklist

• I have searched the open pull requests for duplicates.
• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• If type: ignore comments were used, a comment is also left explaining why.

[codecov]

Codecov Report

Merging #1817 (a608704) into master (6fc350f) will not change coverage.
The diff coverage is 0.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1817   +/-   ##
=======================================
  Coverage   33.21%   33.21%           
=======================================
  Files          96       96           
  Lines       18657    18657           
=======================================
  Hits         6196     6196           
  Misses      12461    12461           

Flag	Coverage Δ
macos-latest-3.10	33.19% <0.00%> (ø)
macos-latest-3.11	33.19% <0.00%> (ø)
macos-latest-3.8	33.20% <0.00%> (ø)
macos-latest-3.9	33.20% <0.00%> (ø)
ubuntu-latest-3.10	33.19% <0.00%> (ø)
ubuntu-latest-3.11	33.19% <0.00%> (ø)
ubuntu-latest-3.8	33.20% <0.00%> (ø)
ubuntu-latest-3.9	33.20% <0.00%> (ø)
windows-latest-3.10	33.19% <0.00%> (ø)
windows-latest-3.11	33.19% <0.00%> (ø)
windows-latest-3.8	33.20% <0.00%> (ø)
windows-latest-3.9	33.20% <0.00%> (ø)

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Impacted Files	Coverage Δ
discord/threads.py	30.18% <0.00%> (ø)

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