Fix: Append all threads if Hint is Cached but attachThreads is enabled

[marandaneto]

📜 Description

Fix: Append all threads if Hint is Cached but attachThreads is enabled

💡 Motivation and Context

Ammend to #1501

💚 How did you test it?

📝 Checklist

• I reviewed the submitted code
• I added tests to verify the changes
• I updated the docs if needed
• No breaking changes

🔮 Next steps

[codecov-commenter]

Codecov Report

Merging #1503 (02b753b) into main (ad283c1) will increase coverage by 0.00%.
The diff coverage is 33.33%.

@@            Coverage Diff            @@
##               main    #1503   +/-   ##
=========================================
  Coverage     76.04%   76.04%           
  Complexity     1930     1930           
=========================================
  Files           191      191           
  Lines          6674     6675    +1     
  Branches        664      665    +1     
=========================================
+ Hits           5075     5076    +1     
  Misses         1274     1274           
  Partials        325      325           

Impacted Files	Coverage Δ
...ry/src/main/java/io/sentry/MainEventProcessor.java	83.49% <33.33%> (+0.16%)	⬆️

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