Removing "filter" function overload

[natejly]

Changed "filter" to "mask_filter" to avoid overloading Python's default "filter" function by deep source suggestion

All existing code using the "filter" function would have to be changed, which could cause issues, so not sure if this change should be merged

[deepsource-io]

Here's the code health analysis summary for commits 989cf90..9bea876. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Python	❌ Failure	❗ 7 occurences introduced 🎯 3 occurences resolved	View Check ↗
Test coverage	⚠️ Artifact not reported	Timed out: Artifact was never reported	View Check ↗

---

💡 If you’re a repository administrator, you can configure the quality gates from the settings.