- Move cta_1d/loader.py, train.py, backtest.py to cta_1d/src/
- Move stock_15m/loader.py, train.py to stock_15m/src/
- Update root __init__.py files to re-export from src/ submodules
- Update src/__init__.py files with proper public API exports
- Update imports to use relative paths within src/
- Add missing create_experiment_dir export to common/__init__.py
- Remove legacy/ directories with old pandas implementations
- Remove test_new_loaders.py development test file
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
