v1.4.455

Changes

PR #2138 by ksylvan: New Claude Fable model + cache OpenAI model discovery and handle provider rate limits

• Add persistent cache for provider model discovery results, improving performance and reliability of provider integrations.
• Serve stale model caches during discovery failures, ensuring continued operation when upstream providers are unavailable.
• Add Claude Fable 5 Anthropic model support, with sampling parameters automatically omitted for compatibility.
• Return concise localized errors for rate-limited model fetches, with updated translations across all supported locales.
• Update Go dependencies for AI provider integrations to keep upstream libraries current.