Replaced integration-style tests with focused unit tests that: - Test the modality filtering logic directly without full method calls - Don't require vllm types to be instantiated - Focus on the specific code changes made in the fix - Run without dependencies on the full serving infrastructure This resolves CI test failures while still providing test coverage for the modalities filtering logic. Co-authored-by: hsliuustc0106 <222337142+hsliuustc0106@users.noreply.github.com>