Fix: Extract exact feature names in DL explainer and resolve Kaleido Docker dependency

fix(api): fix singleton AttributeError in artifacts_loader.py

feat(api): implement auto-download artifacts and fix system robustness

fix: artifacts loader, complete singleton pattern

fix: autodownload models and artifacts

feat(api): implement auto-download artifacts and fix CI configuration

fix(ci): fix HF_TOKEN syntax and spaces config

fix: app

fix: app?

feat: Add Vercel deployment configuration for ML and DL APIs

feat: Implement Deep Learning system architecture