Added comprehensive documentation for MPC system integration:
- MPC_INTEGRATION_GUIDE.md: Complete integration guide for backend developers
* System architecture explanation
* Service responsibilities and relationships
* Standard MPC session types (keygen/sign/recovery)
* Integration examples (Go/Python/HTTP)
* Troubleshooting guide
- VERIFICATION_REPORT.md: System verification report
* Service health status checks
* API functionality verification
* E2E test issue analysis
* System maturity assessment
- test_real_scenario.sh: Real scenario test script
* Automated verification workflow
* Keygen session creation test
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
