Seven new .mp fits from the fine/test sweeps (0.0001 .. 0.3), the S50C workpiece material and CuttingParameter side-files they reference, the schema-migrated S50C.hincproj, and the test-err-ratio project. These were produced by runs on HiNC-1 and existed only in dt's working tree. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>