Update README with complete voice interface and privacy-first architecture documentation

Full frontend-backend integration: environment config, CORS, API endpoints, and comprehensive integration test. All user journey and API connectivity verified working.

Integrate x402 payment system into FastAPI backend - Add x402 middleware integration with proper error handling - Implement booking API endpoints with payment integration - Add payment pricing and cost calculation endpoints - Fix import issues and add proper error handling - Enable crypto payments for travel bookings with USDC

Fix booking system: Add missing calculate_travel_cost function, database models, and migration fixes - Resolves runtime error in agent_tools.py - Adds Booking model with proper relationships - Implements database service functions for bookings - Fixes Alembic migration issues - Integrates booking tools with database persistence

Phase 4: Complete Database Integration - Added PostgreSQL with Docker Compose, SQLAlchemy models, Alembic migrations, and updated backend to use persistent storage

Phase 2 complete: API hardening, backend decoupling, and scaffold Next.js frontend (home, review, dashboard)

Finalize project: update README, scripts, troubleshooting, and demo instructions

Add comprehensive demo script with timing, talking points, and checklist

Decentralized referral system: payment split, IPFS posting, retrieval tool, UI polish, and demo readiness

docs: update README with troubleshooting steps and dependency fixes; update requirements for CDP, ChromaDB, and Python 3.13 compatibility

Update README with comprehensive documentation: add testing section, tool table, contributing guidelines, and current project status

Integrate Amadeus travel API: add flight search, airport info, travel recommendations tools; update planner; add test script; cleanup

Update: Simplified agent architecture with direct tool handling

Update README.md to reflect latest changes

docs: update README for multi-node workflow, tools, and RAG