- Additions for `AICFilter` and `AICVADAnalyzer`:
  - Added model downloading support to `AICFilter` with `model_id` and `model_download_dir` parameters.
  - Added `model_path` parameter to `AICFilter` for loading local `.aicmodel` files.
  - Added unit tests for `AICFilter` and `AICVADAnalyzer`.
