chore: Add augment_image function to utils.py

chore: Update kandinsky_inpainting_inference endpoint URL

chore: Update API endpoints to use HTTPS

chore: Update Dockerfile and requirements.txt, and install additional Python packages

chore: Update import statement for InpaintingRequest in painting.py and refactor code to use shared BaseModel for Painting and InpaintingRequest classes

chore: Refactor code to use shared BaseModel for Painting and InpaintingRequest classes