v2.3.4 - runtime and release hardening

Fixed

• Relay runtime addon responses consistently for live-inspection tools.
• Return runtime screenshot image content reliably in automation flows.
• Sanitize OpenAI-facing tool names before exposing them to clients.
• Skip unsupported shell-hook installation steps during Windows setup.

Improved

• Stabilize node-based test spawning and CI dependency-audit handling for release verification.
• Remove the expired Discord invite from the README.