- Add integration test cases for validating script execution, outcomes, workflow variables, and fault handling.
- Introduce helper methods in `WorkflowTestFixture` for outcome retrieval, activity status, and output assertions.
- Extend test guidelines with usage examples for new `WorkflowTestFixture` capabilities.
- Implement tests to validate execution of valid and invalid scripts, outcome settings, workflow variable access, and complex script handling.
- Add `WorkflowTestFixture` to streamline integration testing setup and execution.
