Module runner 

Engine runner - polling loop and event dispatch.

This module contains the main event loop that:

1. Polls exchanges for fills and quotes
2. Synthesizes canonical events
3. Dispatches events to strategies
4. Executes strategy commands
5. Syncs fills to upstream API for PnL tracking

Structs

BacktestFill

Individual fill record for backtest results (serialized to frontend)

BacktestPositionSummary

Final position and PnL summary for one tracked instrument.

BacktestResult

Backtest result summary for JSON output

EngineRunner

Engine runner - drives the main event loop

RunnerConfig

Runner configuration

TradingStats

Trading statistics for meta logging (Poll mode)

Enums

PollResult

Message from polling tasks to the main loop

Functions

spawn_runner

Spawn the runner as a background task

spawn_runner_with_syncer

Spawn the runner as a background task with optional trade syncer and account syncer