- Implement aruco/depth_save.py with save_depth_data/load_depth_data
- Add tests/test_depth_save.py covering roundtrip and edge cases
- Ensure type safety with basedpyright
- Support compression and metadata handling
- Extract apply_depth_verify_refine_postprocess() from main() for testability
- Add test_depth_cli_postprocess.py using mocks to validate JSON and CSV behavior
- Keeps CLI behavior unchanged
- Retrieve depth + confidence measures from SVOReader when depth enabled
- Compute depth residual metrics and attach to output JSON
- Optionally write per-corner residual CSV via --report-csv
- Post-process refinement: optimize final pose and report pre/post metrics
- Add unit tests for depth verification and refinement modules
- Add basedpyright dev dependency for diagnostics