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Linux CPU sidecar: PyPI's default torch on Linux includes CUDA (~800MB). UV_NO_SOURCES only bypasses our custom CUDA index but still gets CUDA-enabled torch from PyPI. Now explicitly installs CPU-only torch from pytorch.org/whl/cpu after sync. Same fix applied to Windows. New cleanup-releases.yml workflow (manual trigger): - Configurable: keep N app releases, keep N sidecar releases - Dry run mode (default) shows what would be deleted without deleting - Protects v1.4.0 (last pre-Tauri release) - Shows release sizes in MB Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>