Fix bug where the generated image is unrelated to the original image

Images generated by diffbir and directly input into facerestore are very likely to appear as pure black images

This causes subsequent node masks to encounter issues

Using vae encode and vae decode before inputting into facerestore resolves the issue

Fix bug date:  2025.03.10

Old photo restoration feature

Processed in three steps: large damaged area restoration, scratch restoration, facial restoration, and coloring

If the image has no damage or scratches, these steps can be skipped

The workflow for damage and scratch restoration is mostly similar to others, with the difference being in facial restoration processing