0.5.1

Setup and documentation.

• Added docs/setup.md (Rails install, env vars, first run, troubleshooting)
• README quickstart points at the setup guide
• Install generator prints the setup URL
• documentation_uri on the gemspec

0.5.0

Initial public release.

• Rails engine and standalone Rack/CLI workspace
• Gemini and Ollama proposal providers with heuristic fallback
• Deterministic SQL certification before a KPI pack is published