- Add concurrent_slots config (fused_engine section, default 1)
- Create executor_shared_t with shared in_flight table + queue mutex for multi-thread
- Move in_flight state from executor_thread_t to executor_shared_t (cross-thread isolation)
- event_executor_thread: per-thread entry point, N threads created in main.c
- Add fundsIncrement to trading_pair_t, triangle_t, signal_leg_t (fetch from KuCoin API)
- Use funds_increment for rounding market buy quote_cost (evaluate.c) and increment floor (executor.c)
- Fix leg 0: remove double-counted apply_fee_hold (evaluate already accounts via ff)
- Remove executor/ and common/ Python directories (dead code after C migration)
- Remove src/http_server.c/.h (was for Python executor, generates warnings)
- Remove dead config keys: socket_path, executor_socket_path, send_signals, rest_host, rest_port
- Remove dead UDS code in events.c/h (send_signal_to_executor, unix_* functions)
- Fix fee hold on leg 0 buys (apply_fee_hold to prevent Balance insufficient)
- Fix PnL leg0_in to use fills[0][4] instead of wrong currency field
- Fix REST keepalive warmup currency (use initial_capital[0] instead of hardcoded USDT)
- Add balance wait between legs via /account/balance WS + eventfd wake
- Fix all strncpy truncation warnings in config.c, symbols_api.c, ws_client.c
Two-process architecture: a C17 fused engine (WebSocket order book
mirror, triangle enumeration, real-time profitability evaluation)
communicating via Unix domain socket to a Python 3 executor (order
placement with paper/live trading modes, REST control API).
Targets KuCoin spot market.
nicolas