Implement FIX gateway, Clearing House, and AI traders as proper C++
actors matching the Optiq architecture, replacing the Python-only
approach from v0.3.0.
New actors:
- FIXGatewayActor: C++ TCP FIX 4.4 acceptor (Logon, NewOrder, Cancel, Amend)
- ClearingHouseActor: Trade clearing, member positions, leaderboard
- AITraderActor: 10 members (MBR01-10) with momentum/mean_revert/random strategies
Changes:
- OrderBook: Trade now carries buySessionId/sellSessionId
- OrderBookActor: Optional clearing house pipe for trade forwarding
- OEGatewayActor: NewOrderEvent handler + exec report subscriber forwarding
- main.cpp: Full 4-core topology (OEG+FIX, Books, MarketData, CH+AI)
- SocketCompat.hpp: Cross-platform socket abstraction (winsock2/POSIX)
- CMakeLists.txt: New sources, ws2_32 on Windows, 3 new test targets
- 6 test suites (44 tests total), all passing
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
