photo-enhance: add CodeFormerRestore stub and ximgproc fallback

Two runtime fixes discovered during testing:

1. CodeFormerRestore stub: CodeFormer custom node (comfyui-reactor-node)
   is not installed on fresh VMs. Added a passthrough stub in smart_photo_node.py
   that keeps the workflow intact while allowing the other stages to work.
   Registered last so the real node from a separately installed package
   takes priority if present.

2. Guided filter fallback: cv2.ximgproc.guidedFilter requires opencv-contrib
   (opencv-contrib-python-headless). Added a try/except in _apply_detail that
   falls back to cv2.bilateralFilter when ximgproc is unavailable. The contrib
   package was also installed on the VM for full quality.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

0 files changed, 0 insertions, 0 deletions