Codex Assist v0.3.1

What's changed

CI fix

• Fixed the failing Tests and lint job by pinning astral-sh/setup-uv to the full immutable tag v8.3.2. setup-uv v8 no longer publishes major tags like @v8, which caused the v0.3.0 release CI to fail before tests could run. Hassfest, HACS, and Home Assistant smoke tests were already passing.

GPT-5.6 model fallbacks

• Extended the curated offline/fallback model list and forward-compat map with the GPT-5.6 family:
  • gpt-5.6-sol, gpt-5.6-sol-pro
  • gpt-5.6-terra, gpt-5.6-terra-pro
  • gpt-5.6-luna, gpt-5.6-luna-pro
• Authenticated installs still discover models from the Codex backend; this update keeps the fallback list current when discovery is unavailable or lags.

Full changelog: v0.3.0...v0.3.1