- Add complete API documentation for application integration (docs/API_DOCUMENT.md)
- Fix check-update API to use version ID comparison instead of string comparison
- Add validation: client version must exist in server version list
- Add support for patch/incremental updates with base_version check
- Add C++ SDK with HTTP client, JSON parser, and crypto support
- Add simple_test.cpp for standalone testing on Windows
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
