Release 0.2.7

[overwrite00]

Summary

• Resolve Electron Forge toolchain audit findings by overriding vulnerable transitive build dependencies.
• Promote MetaLens 0.2.7 to stable with a stable changelog entry.
• Include the FastAPI 0.140.0 dependency update from the beta cycle.

Validation

• npm --prefix electron audit --audit-level=low
• npm --prefix electron ls @electron/rebuild node-gyp tar tmp brace-expansion --depth=10
• npm --prefix electron exec electron -- --version
• npm --prefix frontend run build
• python\.venv\Scripts\python.exe -m pytest python/tests/ -v
• npm --prefix electron run make -- --skip-package=false
• GitHub Actions Build & Release: success on develop
• GitHub Actions CodeQL: success on develop