Sandboxd local runtime runtime-v0.3.22-preview.1

Experimental Linux container runtime bundles for Desktop setup, not a standalone desktop installer or a stable engine release. Built and lifecycle-tested natively on Linux ARM64 and x64. macOS/Windows Desktop setup and real provider inference remain unverified. OpenCode and Codex binaries are present but require separately tested authentication; Claude Code and Pi are not installed in this bundle. No production upgrade is implied. Includes the generic provider-error compression fix. Checksums bind the archives; clients must pin them independently before loading. Images are exported without tags to preserve existing installations.