Improvement
- [B3UMDFHCPP-85] - Add orderBook pool
- [B3UMDFHCPP-84] - Limit incremental queue length
- [B3UMDFHCPP-83] - BREAKING CHANGE: Introduce SinglethreadedEfViFeedEngine
- [B3UMDFHCPP-82] - BREAKING CHANGE: Rename LogLevel::Fatal to LogLevel::Disabled
- [B3UMDFHCPP-81] - Introduce SingleThreadedSocketFeedEngine