Blender Design v0.12.0 RC

Release Candidate

This plugin release pins PartMe Blender MCP v0.6.1 RC and is intended for controlled validation. Core Blender workflows and distribution gates pass; real-account Sketchfab OAuth, TokenHub authorization, paid model generation and final cross-platform foreground acceptance remain release gates before a production-ready declaration.

Full Changelog: v0.11.3...v0.12.0