[Testing] Enhance local runner validation

Migration from https://github.com/aws/aws-durable-execution-sdk-python-testing/issues/26

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## Context
Implement backend service worker validation rules in local runner

## Technical Requirements
- Implement backend service worker validation rules in local runner
- Add corresponding exception handling for new validation errors
- Update existing tests to handle new validation logic

## Acceptance Criteria
- [ ] Backend service worker validation rules implemented in local runner
- [ ] Exception handling added for new validation errors
- [ ] Existing tests updated to handle new validation logic