feat: Improves EvaluationContext thread safety #69
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This PR
Creates a deep copy of the evaluation context before passing it into the provider. While the original evaluation context class could be mutated by the hosting application, the copy will not be affected, ensuring higher thread safety guarantees for the consuming provider.
Mutable classes are made thread safe as well.
Related Issues
Race conditions within
onContextSetimplementation have been reported for some Swift Providers.How to test
Unit tests provided for the deep copy, but difficult to test the race condition possibility.