Tags: OpenVVVF/Hardware

Updated mechanical model; regenerated Fab artifacts; printed-part qty…

… fixes

- InverterMechanical.FCStd model update
- Re-extracted STEP models, holes.json, model_parts.json,
  mcmaster_model.json via freecadcmd; re-rendered info.png/info-back.png
  via headless Blender
- MechanicalBOM.txt: McMaster 6926K56 qty 3 -> 5 (model merge)
- Added info.txt for HW-C2-DCLSPCR-PRINTED-A (Qty=6 per model) and
  HW-C2-SHELL-PRINTED-A (Qty=1) so BOM quantities match the model