Clean repo for portfolio: archive competition internals, update README and CLAUDE.md

docs: align video script with actual sample case, deployment, and new UX features

Implement validation pipeline fixes (P1-P7) and experimental track system

docs: full documentation vs reality audit

MedGemma validation: 50-case MedQA run, TGI endpoint config, prompt improvements

docs: full accuracy audit, add validation framework to all docs, fix test_e2e.py, create TODO.md

Update all documentation for conflict detection feature

Initial commit: CDS Agent - Clinical Decision Support System