Use getattr to dynamically call the correct function name for each
preprocessor (e.g. 'estimate_pose' for DWPose, 'execute' for others).
This resolves the 'object has no attribute execute' error.
Import preprocessor classes from the dynamically loaded NODE_CLASS_MAPPINGS
dictionary rather than trying to import directly from module paths.
This matches how comfyui_controlnet_aux actually exports its classes.
Verified correct node names:
- DepthAnythingV2Preprocessor ✓
- DWPreprocessor ✓
- CannyEdgePreprocessor ✓
- OpenposePreprocessor ✓
- MiDaS-DepthMapPreprocessor ✓
samizdat