v0.3.1

Anchors the published codex-sidecar-mcp@0.3.1 npm package.

Fixed

• Start the MCP stdio server when codex-sidecar-mcp is invoked through an npm global bin symlink — the normal launch path for Claude Code and other MCP clients.
• Added a symlinked-bin regression test so distributed MCP installs keep listing all six sidecar tools.

Documentation

• Documented npm symlinked bin startup as part of the supported MCP distribution path.

See CHANGELOG.md for full history.