[Testing] Add history error handling and filtering

Migration from https://github.com/aws/aws-durable-execution-sdk-python-testing/issues/38

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## Context
Add validation for non-existent executions

## Technical Requirements
- Add validation for non-existent executions
- Implement sensitive data filtering

## Acceptance Criteria
- [ ] Validation added for non-existent executions
- [ ] Sensitive data filtering implemented
