v1.4.460

Changes

PR #2166 by ksylvan: feat: add Claude Opus 5 support and refresh dependencies

• Add Claude Opus 5 to the supported model selection.
• Disable sampling parameters for Claude Opus 5 requests.
• Restrict one-million-token beta headers to compatible Claude models only.
• Remove unsupported 200K-context models from the beta header mapping.
• Upgrade Anthropic, AWS, Ollama, Google, and supporting dependencies.