Add support for loading pipelines from TOML graph configs in the
pipeline runner, maintaining full backward compatibility with presets.
- Add graph_config parameter to run_pipeline_mode() function
- Support both preset mode and graph mode with conditional logic
- Graph mode: loads from TOML file, uses graph-defined stages
- Preset mode: maintains existing behavior with manual stage building
- Handle items/context appropriately for each mode (graph uses own data sources)
- CLI display flag works in both modes
Backward compatible: graph_config defaults to None, so existing calls
to run_pipeline_mode(preset_name) continue to work unchanged.
David Gwilliam
1a7da400e3