fix: add missing ComfyUI-Impact-Pack dependencies

- Add scikit-image for image processing
- Add piexif for EXIF metadata handling
- Add segment-anything for SAM model support

These dependencies are required for ComfyUI-Impact-Pack to load correctly.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

models/comfyui/requirements.txt

@@ -10,3 +10,6 @@ einops
 kornia
 spandrel
 soundfile
+scikit-image
+piexif
+segment-anything