Merge upstream/main: reconcile async-DB/FastAPI/React fork with ML methodology branch

Revert face_align=True for DINOv2/EfficientNet Auth/Face Deepfake

Add classical ML tie-breaker + face-crop fix for face-swap blind spot

Migrate EfficientNet Auth and Face Deepfake onto shared portrait loader

Apply reservoir sampling fix to EfficientNet Auth training too

solvje the CI error

feat: Add production infrastructure, CI/CD, Docker, tests, and implementation plan

feat: Add v2 architecture — FastAPI + Gradio, core pipeline, CorefakeNet, training suite

Add ViT deepfake detector and optimize ensemble scoring

Initial commit: AI Authenticity Checker