🚀 Production-ready multi-agent medical simulation with major improvements

Complete 5-phase clinical simulation: agents, complications, WhatsApp UI, exam module

feat: Fix case routing, add session tracker for dynamic analytics

feat: Wire frontend to backend APIs and upgrade Socratic tutor to Claude

feat: Expand all specialties to 10+ cases, update API for 14 specialties

feat: Build complete RAG system with real Indian medical corpus + ChromaDB + Claude API

feat: Initial Clinical-Mind project setup with full-stack architecture