[Open] useknockout - free SOTA background removal + super-res API alternative to remove.bg / Topaz, MIT, runs on Modal

Released v0.6.0 of useknockout this week. Single FastAPI service, 20 endpoints deploys to Modal in one command. Endpoints - /remove (BiRefNet + pymatting matting refinement) - /upscale (Swin2SR or Real-ESRGAN, x2/x4) - /face-restore (GFPGAN v1.4) - /replace-bg, /remove-batch, /remove-url All weights