- Add backtest proto definitions with selector and state types
- Update domain types for backtest session and configuration
- Implement backtest selector flow for data range input
- Add CLI operator client and handoff test coverage
- Update generated code for proto changes
- Add worker socket backtest mapping implementations
- Include agent-task for milestone tracking
- Add backtest and market socket handlers for API and Worker
- Add proto definitions for backtest and market services
- Update client socket integration and tests
- Generate protobuf code for Go and Dart
- Archive completed agent tasks under agent-task/archive/2026/05/
