- Refactored heatmap rendering, stateful engine, and scan conversion from test_shenron.py into new sim_radar_utils.plots module
- Updated FastHeatmapEngine to automatically respect xRange/yRange overrides sourced from config.yaml
- Calibrated Range-Doppler plot limits to ±8 m/s in config.yaml for optimized visual inspection
- Cleaned up test_shenron.py by removing ~150 lines of redundant visualization logic and heavy Matplotlib imports
- Added __init__.py to sim_radar_utils to ensure proper package identification