Adopt shared mapper test data from engine-test-data #196
Description
Mapper tests use inline expected context data. When engine-test-data releases shared mapper test cases, this client should adopt them for cross-SDK consistency.
Acceptance criteria
- Mapper test uses expected context from engine-test-data
- mapper_test_cases pass (see feat(Mappers): Add mapper test cases engine-test-data#46)
Technical context
Test data: Flagsmith/engine-test-data#46